Algorithms and Data Structures group
Dr. Anja Rey
Theoretical analysis of practically important aspects of cluster analysis
The area of cluster analysis is concerned with the search for unknown structure in data. The goal is to find hidden clusters, i.e., groups of points that belong together. Clustering has many applications in the area of data analysis and has thus been studied in various variations, leading to a huge body of clustering research.
However, clustering also suffers from a large gap between theory and practice, even with respect to the objective functions that are studied. In theory, combinatorial problems like k-center and k-median are extremely well studied.
In practice, methods for very different types of problems play a much larger role, e.g., for k-means clustering or for hierarchical clustering. Additionally, there can be additional demands on the solution, leading to constrained clustering problems.
Our goal is the theoretical analysis of practically relevant questions in the area of cluster analysis. This includes the study of the approximability of more practical variants of clustering as well as the analysis of popular heuristics, e.g., under structural assumptions on the input data. Our project consists of two parts.
Clustering with constraints (Melanie Schmidt)In the first part, we consider the effect of constraints on clustering problems. Examples for constraints are capacities, lower bounds, fairness constraints and outliers. First, we want to develop better approximation algorithms for clustering problems with constraints. Second, we want to analyze popular heuristics and develop practically efficient algorithms. In both cases, we are also interested in combining different constraints. Third, we want to study clustering problems with constraints in data streams.
Hierarchical clustering (Heiko Röglin)The second part considers hierarchical clustering. Instead of fixing a specific number of clusters k, hierarchical clustering computes a hierarchy of clusterings. Hierarchical clusterings play a major role in applications, yet they have been studied very little in theory. First, we want to analyze the approximation ratio of the very popular greedy heuristics for hierarchical clustering. Second, we want to develop approximation algorithms with small approximation ratios, which are not yet known for most of the variants of hierarchical clustering. We are also interested in lower bounds on the ratios of algorithms and lower bounds on the approximability itself. Third, we want to develop global objective functions for hierarchical clustering.
Approximation Algorithms for Geometric Data Analysis and Their Practicability
Geometric data analysis is an emerging field on the intersection of computational geometry and machine learning that is concerned with the analysis of data that has geometric properties. Algorithmic data analysis is a term that is being established for designing methods for data analysis by using techniques from the areas of algorithms, theory or algorithm engineering. In this project we are interested in algorithmic geometric data analysis, or, more precisely, in approximation algorithms for geometric data analysis tasks. The focus is on finding algorithms with provable performance guarantees, and on translating them into methods that are practically efficient from the view point of algorithm engineering.
Data analysis tasks are often very difficult to solve, involve side constraints or have a complicated combinatorial structure. Approximation algorithms run in polynomial time and provide a provable bound on the worst quality produced. They are particularly interesting for solving data analysis tasks in practice if they are also practically efficient and provide high quality results (often much better than their theoretical guarantee). The area of practical approximation algorithms for data analysis tasks has gained a lot of popularity lately. We will pursue this approach for different geometric data analysis tasks with a focus on clustering and in particular k-means.
- (Approximation algorithms for) Cluster Analysis
- Randomized Algorithms & Probabilistic Analysis
- Bits and Pieces: Basic Number Representations (GI2: Chapter 1, in german),
Pumping Lemma (in german), Splay Trees (in german), Skip Lists (in german)
- Winter 2021/2022: Bachelor-Seminar: Fortgeschrittene Kürzeste-Wege-Algorithmen für die Routenplanung
- Winter 2021/2022: Grundzüge der Informatik II / Theoretische Informatik
- Winter 2020/2021: Grundzüge der Informatik II
- Winter 2020/2021: Reading Group on Open Problems
- Summer 2020: Reading Group on Approximation Algorithms for Clustering
- Summer 2020: Seminar Clustering mit Nebenbedingungen
- Summer 2020: Seminar Competitive Programming
- Winter 2019/2020: Grundzüge der Informatik II
- Summer 2019: Projektgruppe Entwurf und Implementierung von Algorithmen
- Summer 2019: Lab Efficient Algorithms for Selected Problems
- Winter 2018/2019: Seminar Foundations of Data Science
- Winter 2018/2019: Cluster Analysis
- Summer 2018: Seminar Advanced Algorithms
- Summer 2018: Randomized Algorithms & Probabilistic Analysis
- Winter 2017/2018: Seminar Advanced Algorithms
- Summer 2017: Randomized Algorithms & Probabilistic Analysis
- Summer 2016: Randomized Algorithms & Probabilistic Analysis


MultBiplotR: A package for Multivariate Analysis using Biplots
Ponente: José Luis Vicente Villardón
Descripción: Biplot methods allow for the simultaneous graphical representations of the rows and columns of a data matrix.; that is useful to visually explore patterns arising from data and also to visually interpret the results more formal statistical models.
Classical and most popular biplot methods are closely related to Principal Components Analysis although the methodology can be extended to any kind of data or many other multivariate techniques.
MultBiplotR includes biplot representations associated to different multivariate techniques as Discriminant Analysis, Canonical Analysis, One and Two Way MANOVA; Simple, Multiple and Canonical Correspondence Analysis, Factor Analysis, Statis-ACT, X-Statis, DISTATIS, Common Principal Components, CoInertia, Redundancy Analysis, Consensus PCA with different consensus criteria, Item response theory models, Unfolding, Constrained Unfolding, vector models on any Euclidean configuration resulting from Principal Coordinates or Multidimensional Scaling methods, Partial Least Squares, etc.
It also includes recently developed biplot representations for categorical data, Logistic Biplots for Binary, Nominal and Ordinal Data.
The package is an R implementation of the MultBiplot package developed in Matlab and used in many scientific papers. (http://biplot.usal.es/classicalbiplot/).
Many of the representations have been developed at the Department of Statistics, by the research group RGBIPLOT of the University of Salamanca.
The package will include the future developments of the research group.


The MATRIX experience has broadened studentís skills in the area of Mathematics. It has given students the opportunity to enhance their knowledge and abilities to use higher order of thinking skills and apply them to authentic mathematical tasks. The use of technology has added a new level of interest to this subject area. With the use of the Internet, Web Quests, on-line math games, graphing calculators, and the interactive text, students are able to expand their horizons. As a member of the INCLUDE grant team, we are committed to providing an inclusive learning environment that accommodates the diverse learning styles and individual needs of all students to promote life long learners.


Welcome to First Grade!
My name is Donna Roensch (wrench), I've been teaching in Belleville for 10 years. I've taught first and second grades during the 10 years.
First grade is a lot of fun. You will be amazed to see how much your child will learn and grow throughout this year.
This year is exciting due to a new ELA program. We will be using a program called Wonders. Belleville is continuing to use our Math series from last year EnVision Math.
I look forward to working with all you this year. If you have any questions please email me email@example.com


On Friday October 17th, Loyola held its first Mini-Hackathon. Statistics graduate student, Hunyong Cho, was the winner!
The Women in Mathematics and Statistics went to Loyola's production of "Proof" to enjoy a Tony Award winning play featuring the subject of mathematics.
Mathematics students around the country have gained assurance that they are going into a great field. A recent report from CareerCast put Mathematics careers in the top four spots for the best jobs for 2014.
The Department of Mathematics & Statistics continues to grow. Join us in extending a heartfelt "welcome" to our new faculty when next you see them [...]


Hi There, I have Different Customers [Column] in Different Years [Column]. The DAX formula that we created will create a new measure named “ProjectedSales2019”. DAX is a collection of functions, operators, and constants that can be used in a formula, or expression, to calculate and return one or more values. It’s done in two steps and uses two DAX calculations instead of one. B. Nested IF Condition. Select Statistical in the Select a category box as shown in the following screenshot. As you can observe, the calculated field Count of Medal appears in the calculation area below the column – Medal. Click the function name. Hi, I'm new to the DAX community and I'm completely perplexed about how to convert my excel formulas into a DAX function that works. Type the first letter of the column name and select the complete name from the dropdown list. List of DAX functions as follows: PATHLENGTH; PATHITEMREVERSE; PATHITEM; PATHCONTAINS; PATH; Text Functions. Type [. The entire column – Medal will be selected. For details, refer to the chapter – DAX Context. DAX MEDIANX functio… Type the DAX formula for the calculated column in the formula bar. Place the pointer on any of the function names. I scoured the internet and learned about a brilliant method that establishes a connection with the PowerPivot Model’s internal schematics, and quickly lists all the DAX formulas from your PowerPivot model in an Excel Table. To create a DAX formula, you type an equal sign, followed by a function name or expression and any required values or arguments. rows with a data value in the key column that does not have a matching value in the primary table key column). For example, create the measures of the current month sales with this DAX formula. ProjectedSales2019 = SUM(Sales[TotalSales2018])* 1.08 Here, we have multiplied the sum of previous year’s (2018) sales by 1.08 because an increase in sales by 8% is expected in the year 2019. Type a DAX operator between expressions or type ‘,’ to separate function arguments. Click the tab of the table in which you want to add the calculated column. String functions in excel matches to the text DAX functions in Power BI. For more details on these options, refer to the chapter – Calculated Fields. DAX BETA.DIST function 2. Math and Trig functions - Mathematical functions in DAX are similar to Excel's mathematical and trigonometric functions. As you can observe, calculated columns require computation and storage space as well. Hence, use calculated columns only if necessary. AutoComplete displays a list of available functions with the names beginning with those letters. The rest of the steps are the same as above. It is important to understand the concept of context in DAX to write DAX formulas. Click OK. Medal Count:=COUNTA( appears in the formula bar and a tooltip displaying the function syntax also appears. Some DAX functions provide time intelligence, which lets you create calculations using meaningful ranges of dates and compare the results across parallel periods. DAX formulas are very similar to Excel formulas. In this formula, you also used … When you click on the fx button, Insert Function dialog box appears. You are done. Before you create your own formulas, let’s take a look at DAX formula syntax. DAX CHISQ.INV.RT function 7. The closing parenthesis of functions is not automatically added. As already discussed in the chapter – DAX Syntax, it is a recommended practice to use the table name along with the column name in every reference to any column name. DAX is a formula language and is a collection of functions, operators, and constants that can be used in a formula or expression to calculate DAX functions play an important role in the usage of DAX for data modeling and reporting. For example, here's a simple DAX formula for a measure: This formula includes the following syntax elements: A. Because DAX formulas are calculated dynamically, you can always be sure that the ranking is correct even if the underlying data has changed. Excel. For example, you can specify a particular relationship to be used in a calculation. Defined names that you create for constants do not get displayed in the AutoComplete dropdown list, but you can still type them. Usage of this handy IntelliSense feature is highly recommended. The same formula can behave differently depending on whether the formula is used in a calculated column or a calculated field. Medal Count: = COUNTA([Medal] will be displayed in the formula bar. While creating your formula, write Sum after the equal sign. The Insert Function button in the Excel window is in the Calculated Field dialog box to the right of Formula. Message 4 of 4 159 Views 0 Reply. DAX CHISQ.DIST.RT function 5. The expression can contain table names and column names connected by DAX operators. DAX BETA.INV function 3. DAX GEOMEANX function 12. Data Analysis Expressions (DAX) is a formula expression language used in Analysis Services, Power BI Desktop, and Power Pivot in Excel. Select COUNTA in the Select a function box as shown in the following screenshot. Every DAX formula has the following syntax −. To create one, you type an equal sign, followed by a function name or expression, and any required values or arguments. Remember to use it while creating any DAX formula. In such a case, you can use Formula AutoComplete in the middle of an existing formula with nested functions. Check it Out! that you can use in DAX formulas. Click the Insert Function (fx) button to the right of Formula. Press enter after typing the SUM. To create a DAX formula for a calculated field in the Excel window, use the Calculated Field dialog box. To enter the name of a column, you can select it from the list of column names in the selected table. You can use the same procedure to create a calculated column also. Active learning lessons for mastering DAX Data analysis expressions (DAX) is the formula language of PowerPivot and this book is written to give hands-on practice to anyone who wants to become competent at writing such formulas. Test 1 =ALL(Products) The above formula returns a full copy of the Products table as shown (in part) below. This DAX formula does the following for every row in the table East_Sales −. The AutoSum feature has done the work for you – created the calculated field for data aggregation. The Insert Function dialog box helps you select functions by category and provides short descriptions for each function. Not all DAX functions are supported or included in earlier versions of Power BI Desktop, Analysis Services, and Power Pivot in Excel. However, the functions have been modified to use DAX data types and to work with tables and columns. You can nest functions and formulas in a DAX formula. The DAX language The DAX language was created specifically for the handling of data models, through the use of formulas and expressions. Power Pivot window also has a formula bar that is like Excel window formula bar. The measure name, Total Sales. The Document can include screenshots of Report Pages, Purpose of the Report, Lists of Navigation, Tables and Queries and a complete listing of the DAX formulas. If you use Calculated Field dialog box in the Excel window, you can check the formula before you save it and make it as a mandatory habit to ensure the use of correct formulas. When you perform data analysis, you will perform calculations on aggregated data. Table manipulation functions - These functions return a table or manipulate existing tables. DAX is used in several Microsoft Products such as Microsoft Power BI, Microsoft Analysis Services and Microsoft Power Pivot for Excel. DAX CHISQ.INV function 6. Click the down arrow next to AutoSum in the Calculations group. You have added a column for Unit Price at which those units are sold with the above formula. For example, the TRUE function lets you know whether an expression that you are evaluating returns a TRUE value. Numeric includes - integers, currency and decimals, while Other includes: string and binary object. Intro to DAX Formulas: So Dax stands for data analysis expression, and it is a new formula. You can create a DAX formula for a calculated column in the Power Pivot window. If you have chosen the table name, type bracket ‘[‘. The DAX function reference provides detailed information including syntax, parameters, return values, and examples for each of the over 250 functions used in Data Analysis Expression (DAX) formulas. Supply the arguments to the function by selecting them from a dropdown list of possible tables and columns or by typing in required values. In the Power Pivot Data Model, it is possible to have non-matching values in a key column and still create a relationship, because Power Pivot does not enforce referential integrity (look at the next section for details). Download this 60 page DAX Formula Reference Guide and learn to master Power BI Development. DAX Syntax Reference However, there are some differences in the numeric data types used by DAX functions. Depending on the row context, the value might change. Click the calculation area of the Results table. Troubleshooting DAX Formula Recalculation. DAX CONFIDENCE.T function 9. Double-click Medal. Excel Functions vs. DAX Functions functions. Refer to the sections below for details. Click the Fx button to display a list of available functions. To create a DAX formula for a calculated field in the Power Pivot window, click a cell in the calculation area in the relevant table. Mastering Intermediate DAX – Power BI, Power Pivot & SSAS (Udemy) Individuals who are attentive … New DAX functions - These functions are new or are existing functions that have been significantly updated. Type an equal sign. If a DAX formula has many nested functions, it has the following disadvantages −. Announcements. These products all share the same internal engine, called Tabular. It is unlikely a formula would ever contain so many nested functions. Deleting rows from a primary table when there are matching data values in the rows of the related table. Type the first letter of a function or table name and select the complete name from the dropdown list. Syntax includes the various elements that make up a formula, or more simply, how the formula is written. Hey, So I'm trying to add a column to filter the current month of the year. If you do not exclusively ensure this, as Power Pivot does not enforce it, you might not get correct results with the DAX formulas created before data changes are made. DAX is continuously being improved with new functions and functionality to support new … By using time and date ranges in combination with aggregations or calculations, you can build meaningful comparisons across comparable time periods for sales, inventory, and so on. The Insert Function button in the Power Pivot window is to the left of formula bar. In a calculated column, the formula is always applied to every row in the column, throughout the table. Results table will be displayed. DAX Statistical functions are very similar to Excel Statistical functions.Following are the DAX Statistical functions − 1. Other functions - These functions perform unique actions that cannot be defined by any of the categories most other functions belong to. Following are some tips for using AutoComplete −. You can create a DAX formula for a calculated field either in the Excel window or in the Power Pivot window. In such cases, you can split the formula into smaller manageable formulas and build the large formula incrementally. Additional functions are for controlling the formats for dates, times, and numbers. Refer to the chapter - Calculated Columns for details. Divides the value in Amount column of a row by the value in Units column in the same row. Lookup functions work by using tables and relationships between them. A DAX function always reference a complete column or a table. A word of caution – To use AutoSum feature, you need to click the down arrow next to AutoSum on the Ribbon. If you enforce referential integrity, you can prevent the following pitfalls −. You can use the DAX functions that are designed to work with relational data and perform dynamic aggregation in DAX formulas. The DAX formula can vary based on whether it is for a calculated field or calculated column. IF AND dax Formula 03-07-2017 08:46 AM. In addition to creating sums and averages, or finding minimum and maximum values, in DAX you can also filter a column before aggregating or create aggregations based on related tables. So far I've only been able to filter out the current month. Statistical functions - These functions perform aggregations. Forecast Calculation by CAGR (Compound Annual Growth Rate): https://community.powerbi.com/t5/Desktop/Finance-Forecast-using-DAX/td-p/318862. COUNTA (DAX has COUNT, COUNTA, COUNTAX functions). But, it is unlikely that a DAX formula contains so many nested functions. Creating a DAX Formula. Further, AutoSum has taken the appropriate variant of the DAX function COUNT, i.e. The Insert Function dialog box is the easiest way to find a DAX function that is relevant to your DAX formula. For example, the ISERROR function returns TRUE if the value you reference contains an error. Start the DAX formula with CalculatedFieldName:=. You need to do it by yourself. When you add a DAX formula to a PivotTable or PivotChart, the results of the formula can be affected by the context. If the formula has errors, it would be very difficult to debug. If you have chosen a function name, type parenthesis ‘(‘. The DAX function reference provides detailed information including syntax, parameters, return values, and examples for each of the over 250 functions used in Data Analysis Expression (DAX) formulas. However, DAX functions are based on the datetime data types used by Microsoft SQL Server. You can use DAX formulas in calculated columns, by adding a column and then typing an expression in the formula bar. At that point, a possible alternative is storing the list of values in a separate table, similar to the one called Selection in the following example: Type the first letter of a function or table name and select the complete name from the dropdown list. Formula bar makes it easier to create and edit formulas, using the AutoComplete functionality so as to minimize syntax errors. Type the first letter of the table name that you want. Press TAB or click the name to add an item from the AutoComplete list to the formula. Relationship functions - These functions are for managing and utilizing relationships between tables. Places the result in the new added column in the same row. This will enable you to create interesting DAX formulas that use the correlations of the columns among the related tables for calculations. DAX provides functions that have the same functionality and names as the Excel functions that you might already be familiar with. The formula would be very difficult to create. You can write a DAX formula as shown below. The names of all the columns and the calculated fields in the current table will be displayed in the dropdown list. Also, because the formula is used in a calculated column, you can use the ranking in a Slicer and then select top 5, top 10, or even top 100 values. This section provides topics that describe function syntax and other attributes of the DAX language. It starts by describing Power BI Desktop model structure and how it can be enhanced with DAX calculations. DAX and Excel share some formulas as well. The data values that are the part of parent and child hierarchy are called as parent-child DAX functions. For example, you want to find the total sales amount in the East region. Important. DAX CHISQ.DIST function 4. If you are working in a Power Pivot table, the context is the current row and its values. Power BI supports extensive Data Analysis Expressions(DAX) scripting to achieve complex business scenarios. However, the presence of blank or non-matching values in a key column might affect the results of the DAX formulas and the appearance of PivotTables. Date and time functions - These functions in DAX are similar to date and time functions in Microsoft Excel. East_Sales is the name of the table. This means you are about to type a column name. DAX provides the IntelliSense feature that will enable you to write DAX formulas promptly and correctly. As you can observe, the selected DAX function syntax and the function description are displayed. Following is an example of DAX formula, which uses a function to calculate a column in a table. You create these formulas −, In the Excel window in the Calculated Field dialog box, or. Power BI DAX introduction. Logical functions - These functions return information about values in an expression. If you want to customize calculations on a row by row basis, Power Pivot provides functions that let you use the current row value or a related value to perform calculations that vary by context. This is termed as – “the fully qualified name”. In fact, such a formula would be very difficult to create and debug, and it probably wouldn’t be very fast either. in-built function provided in the DAX language to enable you to perform various actions on the data in the tables in your Data Model with matching values in the key columns). In this post, I describe a quick way to list all the DAX formulas in your PowerPivot for Excel 2010 Data model. DAX formulas can include DAX functions and leverage their usage. For example, Total East Sales Amount:=SUM ([East_Sales[Amount]). The DAX formula also appears in the formula bar −. Begin to type the first few letters of the function name. For an overview of how you can use DAX formulas, see Getting Started with Data Analysis Expressions (DAX). Consider the orders table in our dataset. Data Analysis Expressions (DAX) is a library of functions and operators that can be combined to build formulas and expressions in Power BI, Analysis Services, and Power Pivot in Excel data models. List of DAX functions as follows: VALUE; UPPER; UNICHAR; TRIM; SUBSTITUTE; SEARCH; … Establishing referential integrity involves building a set of rules to preserve the defined relationships between tables when you enter or delete data. Adding rows to a related table when there is no associated row in the primary table (i.e. Close the parenthesis. When you create a relationship between two tables, you are expected to make sure that the two columns used as keys have values that match, at least for most of the rows, if not completely. You can also follow the same steps to insert a function in the Calculated Field dialog box in the Excel window using the Insert Function feature. Repeats steps 1 and 2 iteratively till it completes all the rows in the table. 7. ... Any DAX Jedi in the house ? Language in power pivot in power bi I Now there are 135 decks formulas, and 71 of them came out of excels function library. Parent and Child functions - These Data Analysis Expressions (DAX) functions help users manage data that is presented as a parent/child hierarchy in their data models. Select from the list, if needed and then press Enter. You can use IntelliSense to complete the formula. AutoComplete displays a list of available tables and columns with the names beginning with that letter. DAX Formulas are essential to learn in Power BI and this guide shows you them all and how to use them If you click on the AutoSum itself instead, you will get −. DAX EXPON.DIST function 10. Click the Medal column. Press Enter. These functions can be used to provide input to other functions, thus calculating values for entire tables or columns. DAX formulas are very similar to Excel formulas. Just if the customer was active in a year, i want to get the years in one row. Changing data in a primary table that would result in orphan rows in a related table (i.e. You can find the Insert Function button labelled as fx, both in the Power Pivot window and Excel window. Filter functions - These functions help you return specific data types, look up values in related tables, and filter by related values. This is where DAX formulas tend to differ from DAX functions in important ways. To select a function from the dropdown list, use the arrow keys to highlight the item and click OK to add the function to the formula. To create a DAX formula, use the following steps −, To the right of the equal sign, type the following −. This enables you to make sure that it is the function that you want to insert. DAX programming formula contains two data types: Numeric and Other. To the right of the equal sign, type the following −. DAX Parameter-Naming Conventions. Text functions - With these functions, you can return part of a string, search for text within a string, or concatenate string values. I'm looking to find the business days between dates. EARLIER Function. Post Reply Helpful resources. It is a good practice to maintain a document for each report which helps in future development. They use the similar syntax structure – a DAX formula starts with an equal sign, is then followed by a function name or expression, and any additional values or arguments. Data Analysis Expressions (DAX) Reference. With this feature, you need not type the table, column, and function names completely, but select the relevant names from the dropdown list while writing a DAX formula. And there are new tax formulas being added … That is, the design of the PivotTable and the choice of row and column headings affects the values that are used in calculations. DAX Formulas. To enter the name of a table, begin typing the name of the table. Click the Results tab in the Power Pivot window. Overall, DAX functions are pretty similar to Excel formulas. DAX Operator Reference Now I want to create a New Table I guess, with the Customer and a Array which includes the Years like this "2017, 2018, 2019" or "2017, 2019". DAX is a formula language for creating custom calculations in Power PivotTables. IntelliSense tooltip will be displayed giving you the use of the function. ALL() with a Table Parameter. Suppose you want to create the following calculated field −, You can use Insert Function dialog box using the following steps −. Insert Function dialog box appears. Repeat steps 1 - 5 till the DAX formula is complete. Time intelligence functions - These functions help you create calculations that use built-in knowledge about calendars and dates. As you are aware, in the Data Model of Power Pivot, you can work with multiple tables of data and connect the tables by defining relationships. Where the full code is kept inside a function to calculate a column, can. Starting of the DAX formula, write Sum after the equal sign, type bracket ‘ [ ‘ time functions. For you – created the calculated column filtering functions let you manipulate data context to create a DAX for. Products all share the same formula can be used to provide input to other belong! Categories most other functions, it is unlikely a formula bar DAX has Count, i.e can contain table and. In two steps and uses two DAX calculations instead of one this where. Values from a primary table when there is no associated row in the calculated fields add calculated!, there are several DAX aggregation functions, thus calculating values for entire tables or columns,! Function dialog box appears IntelliSense tooltip will be limited to those starting with ‘ ) ’ designed to with. To understand the concept of context in DAX formulas in a primary table there. Both in the column, you can observe, calculated columns for details filter by values! Defined relationships between them column ) leverage their usage use only particular values from a dropdown list not be by! Contain so many nested functions values or arguments string functions in DAX are similar to Excel.... Tab in the dropdown list and the choice of row and column headings affects values. The expression can contain table names and column headings affects the values that are in! Parenthesis along with a data value in Units column in a DAX formula shown! Or select a function name, type the starting of the categories most other functions, it be! Formula AutoComplete in the new added column in the Excel window in the formula can used. Of possible tables and columns or by typing in required values an open parenthesis along with a suggestion! A calculation with ‘ ) ’ to provide the name of a function name above formula returns a full of! The East region share the same procedure to create a DAX formula, use correlations... Have about 30 columns in my worksheet that deal with dates by typing required! Column that does not have a matching value in the calculated field Count Medal. Example, the value you Reference contains an error information about values related. Does not have a matching value in Units column in the key column that not! Next to AutoSum in the following for every row in the Excel window formula and... In formulas that perform financial calculations, such as Microsoft Power Pivot window has... Function names to enter the name to add an item from the dropdown list containing valid table that! It easier to create a DAX formula Reference Guide and learn to master Power BI Development ISERROR function TRUE! One, you can refer to the Text DAX functions in important ways so many nested functions always... Headings affects the values that are used in several Microsoft Products such as net present and! I 'm trying to add a column, throughout the table name and select the name. Click OK. Medal Count: = COUNTA ( DAX has Count, i.e the! A simple DAX formula is always applied to every row in the dropdown list available!, once you type the DAX Statistical functions are for controlling the formats for dates,,... Usage of this handy IntelliSense feature in a Power Pivot window important.! An overview of how you can refer to the right of formula bar − sold the. The use of the current month of the columns and the function that like. Click OK. Medal Count: = COUNTA ( [ Medal ] will be displayed giving the! On any of the related table DAX Statistical functions are supported or included in earlier versions Power. Place the pointer on any of the columns among the related tables for calculations =ALL ( Products the. Such as Microsoft Power BI Desktop, Analysis Services, and any values... So DAX stands for data Analysis Expressions ( DAX ) language is library! Refer to the right of formula bar that is like Excel window, use the functions! Very difficult to debug formulas: so DAX stands for data Analysis Expressions ( DAX ) is! Start with one letter and type more letters to narrow down the list, needed! To work with tables and relationships between tables type more letters to narrow down the list if required to out.: a actions that can be combined to build formulas and Expressions language, where the full is. Familiar with by category and provides short descriptions for each report which in!


Maths: arithmetic paper due Weds 9th
SPaG: spag.com test due Friday 11th
Spellings: to be tested Friday 11th
Maths: Arithmetic Paper (due Weds 2nd May)
SPaG: Online test (due Friday 4th May)
Spellings (to be tested Friday 4th May)
Please complete the '2013 SATs - Level 3-5' test.
Complete pages 38 and 39 in your books please.


1.6 - Combinations of Functions
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The domain of each of these combinations is the intersection of the domain of f and the domain of g. In other words, both functions must be defined at a point for the combination to be defined. One additional requirement for the division of functions is that the combining functions and their domains can't be zero, but we knew that because it's part of the implied domain. Basically what the above says is that to evaluate a combination of functions, you may combine the functions and then evaluate or you may evaluate each function and then combine.
As you can see from the examples, it doesn't matter if you combine and then evaluate or if you evaluate and then combine. In each of the above problems, the combining functions and their domains is all real numbers with the exception of the division. The domain in the division combination is all real numbers except for 1 combining functions and their domains While the arithmetic combinations of functions are straightforward and fairly easy, there is another type of combination called a composition.
A composition of functions is the applying of one function to another function. The symbol of composition of functions is a small circle between the function names. I can't do that combining functions and their domains in text mode on the web, so I'll use a lower case oh " o " to represent composition of functions.
These combining functions and their domains read "f composed with g of x" and "g composed with f of x" respectively. The function on the outside is always written first with the functions that follow being on the inside. The order is important. Composition of functions is not commutative. This example probably needs some explanation. From the prerequisite chapterthe square root of x 2 is the absolute value of x. The square of the square root of x is x, but this assumes that x is not negative because you couldn't find the square root of x in the first place if it was.
This is a case where the implied domain because of the square root is no longer implied because the square root is goneso you have to explicitly state it I told you it all fit together.
If the last example needed some explanation, then this one definitely needs some, too. Let's take the easier one g o combining functions and their domains x first. Okay, now for the harder one f o g x. I'll give the simple explanation here and the more complete one later.
After simplifying, you got the square root of -x 2 - 3. When you find a composition of a functions, it is no longer x that combining functions and their domains being plugged into the outer function, it is the inner function evaluated at x. So there are two domains that we have to be concerned about. If we consider f o g xwe see that g is evaluated at x, so x has to be in the domain of g.
We also see that f is evaluated at g xso g x has to be in combining functions and their domains domain of f. When you combine the two domains to see what they have in common, you find the intersection of everything combining functions and their domains nothing is nothing the empty setso the function is defined nowhere and undefined everywhere. Decomposition of functions is the reverse of composition of functions. Instead of combining two functions to get a new function, you're breaking apart a combined function into its separate components.
There is often more than one way to decompose a function, so your answers may vary from the books. Basically, you want to look at the function and look for an "outside function" and an "inside function". Another thing to look for is repeated patterns and make that the inside function. The outside function is summarized as "the big picture" and the inside function is "what you are doing the big picture to".
Difference quotients are what they say they are. They involve a difference and a quotient. A difference quotient is really the slope of a secant line between two points on a curve. For polynomial functions, finding the difference quotient isn't that difficult. Where you're going to run into trouble is combining functions and their domains radical and rational functions. The trick with a radical function is to rationalize the numerator by multiplying by the conjugate of the numerator.
Don't worry that you're left with a radical in the denominator, it's okay in this instance. It's much better than having a factor of h in the denominator because in calculus, we're going to let h approach 0 and we'll want to just plug a zero in for h. When given the choice of having a radical in the denominator or division by 0, we'll pick a radical in the denominator anyday. The big thing going on is cubing something, so the outside function is a cubing function.
The big thing going on is taking the square root outside9-x is what you're taking the square root of inside. Combining functions and their domains every occurrence of the pattern by x for the outside function.


Algebra 1 is the first of the four college-prep math classes that Loomis School offers. It is taken during the freshman year.
Because this class is not required (a student could take Prealgebra), we move through the material at a quick pace. We have high expectations for each student to commit the appropriate amount of time and effort to learn the material.
Homework is a critical part of Algebra 1 and will be assigned regularly. Just as athletes must practice their sport often, math students must practice their math often. Homework is the method of practice, and is necessary to help commit the concepts to memory as quickly as possible, as we move forward to new concepts each day. Homework may or may not be graded. Homework should not be looked at as a large part of the overall grade, as its main purpose is practice towards mastery of concepts.
Each chapter will have at least one test. To assure that a student's overall grade reflects concept mastery, tests will be the main portion of the Algebra 1 grade.
Any student that is struggling/concerned with a concept should see me as soon as possible! Algebra concepts build upon one another. Not grasping a concept has an enormous impact on the ability to learn future concepts, and the Algebra 1 grade. I am available before school, after school, during planning time, and during study hall.


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Our article Understanding statistical terms: 1 (DTB 2009: 47: 22–24) stated that the standard deviation of a population is calculated by “a formula (see box) that involves subtracting the mean value (µ) from each data value (x); squaring each of these differences; summing all these squared differences…dividing this sum by (n-1) where n is the number of data values; and taking the square root of the answer.”The penultimate part of this sentence should have read “…dividing this sum by n, where n is the number of data values…”. The formula was correctly written in the box accompanying the text.


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What Is Square-root In Z?
The issue with many students is that they do not really understand what’s the square root in mathematics.
Numerous students believe the answer to the math problem is dependent upon they manner in which they go about doing it. Since the solution of the problem can be completely different based on the man or woman pupils put a great deal of effort into finding the clear answer out.
The fact writing service is that the square root of a number is a number, which is multiplied or divided to get a quantity. A student who has the capability to understand that this can be able to come up with their particular replies, which are also always correct.
Some students may examine the origin of some and see that it is an entire range. It’s definitely an integer, When some students is able to see . When students is able to see that a number is a whole number or a integer, they can start to discover how to use the square root to resolve for grademiners.com a number. Knowing this notion is the initial step in doing mathematics troubles that are heightened.
One individual could go to the shop to get a seat to get their own baby, even though another man or woman could go to the shop to purchase the other seat to their own baby. They will be able to establish whether it is the best chair for your own baby, after understanding the gap between a chair and the other chair. They should still strive to achieve that even though students may not be able to clearly show their scholar adviser how they can calculate the square root of the few to find out exactly what the remedy is.
For college students who continue to be unsure concerning the reason why they’re doing so, try to convince them https://www.unh.edu/ that by figuring out a number’s sq root, they will have the ability to find out what is the remedy for this issue. Quite often, college students usually do not completely realize the concept of square roots.
It is important that pupils understand what would be the number which provides them with the clear answer that they want to get. If students is attempting to do a challenge that has a couple for every digit, chances are they are going to soon be able to use the power of this number to figure out what the specific option is.
They may still make use of the process to figure out the ideal responses, When a student doesn’t need the response to the problem. Students should attempt to think of tactics to use the solutions and then they are going to be more capable to solve these.


25 Aug 2016
WHEN DOES 1 + 1 ≠ 2?
Higher level math teaches us that one plus one does not always equal two. As in math, we often see response to two nutrients applied together greater than the individual response of each separately. In other words, “X can be greater than the sum of its parts”.
The same principle applies to strategic partners. IPNI is successful because of the strategic partners and collaborators we work with. We are a small organization with 32 scientists working across the globe. But in the last 25 years, we have supported almost 2,200 research projects related to nutrient management. We provide ideas and a little seed money and find willing partners to work with. Those 2,200 projects cost us over $13 million, but the total cost of the projects was more than 10 times that.
We leave the “hands-on” research to our academic colleagues and other partners, who have the expertise, the laboratories, and field equipment and we use our expertise in extending the results they generate, in translating and teaching the practical applications to the end-users. Our partners do the research and we tell their stories. It’s a great partnership, with each partner contributing to their strengths.
The benefits of working together are extraordinary and greatly rewarding. Agriculture is the beneficiary. The sum of our contribution plus that of our partners is much greater than either of us alone.
When it comes to fertilizers and ag research … one plus one is a lot more than two.
Terry L. Roberts


Mr Gnan graduated with a Bachelor of Science Degree (Majoring in Mathematics) in 1994. He started his teaching career at a reputable institution as an A/L Mathematics teacher for about 15 years from 1996 to 2011.
Besides teaching experience at his school, he also participated in many administrative and coordinating activities, such as the Master-in-Charge and a key member of the Association of Science & Technology, Executive member of the Parents Teachers Association (PTA), Manager for the school Hockey team, Coordinator in-charge for the Students’ Photography Club. He also participated in many workshops conducted by the MOE and NIE.
He also completed his Post Graduate Diploma in Education (PGDE) in 2006. He was also an Examiner for 10 years and he has ample experience in setting A/L Maths exam questions with marking schemes and marking papers.
He published two books for A/L Mathematics and one book for O/L Mathematics.
He has been with different Singapore tuition centres since 2011. He was involved in Maths Curricula development for A/L and O/L, H1 and H2 Maths, IGCSE, and IB. Also became a Maths Consultant and taught maths for JC and upper Secondary students which he was able to produce good results, a fair percentage of students obtained A and B+ grades.
His lessons, which are known for the use of real-life applications of mathematics concepts, help his students quickly and easily grasp concepts and foster a greater appreciation for the subject.


My school is about to implement some sort of math facts fluency standards. This is probably a good thing when the majority of my students coming into the year had count up or down on their fingers when they are doing addition and subtraction. Not to mention 5th graders who still add 6 eight times to figure out 6 x 8. Yes, they figure out what 6 x 8 =, but it shouldn’t have to be that heard. At least in my opinion, it shouldn’t be. There is also research that shows when students have to apply brain power to figuring out basic facts, they miss out on higher level concepts.
Just saying that facts fluency should be part of the grade and handing out timed tests that have 150 problems is NOT the way to go about doing this. We need to figure out quite a few things before jumping in blind. Some questions I have in my head are:
- What is considered an acceptable percent correct? 80%? 90%? 95%?
- How many facts should a student be able to perform in the given time?
- How does this lend itself to traditional grades? Does it at all?
- How do you test for fluency?
- How often do you test?
Those questions are off the top of my head and I’m sure there are other issues.
My thoughts to the questions:
1. 90% seems right to me. If a student is doing this from memory and is missing more than 10%, they don’t know the facts. Right?
2. This is a tricky question and one which I will get into more below. I’m pushing for measuring it in facts per minute. Some teachers prefer the marathon facts quizzes of 200 problems while others prefer a test of 50. I lean to the side of 50 but have another reason for doing it per minute. (Question 4)
3. No clue how this can fit into a traditional grading scale. I’m not even sure it should be included in the grades, but many teachers feel that if it isn’t a grade the parents won’t support it at home.
4. My class uses That Quiz to practice our facts. Beautiful and simple set up. I can control the time, range, process, and the number of problems allowed. Then, it gives me a percent correct and shows any problems missed. Last, the kids love it. Compare this with a pencil and paper with 150 problems on it, which would you choose? Even better, I don’t have to grade through 2,000 simple facts to see how my students are performing. It tells them and me immediately.
5. Using That Quiz, I let them test anytime they can. I don’t have to grade any of them, only record their scores on my spreadsheet. Test all day, you’ll learn them eventually.
Coming together as a staff to discuss this, we’ll get 25-30 different responses to these questions. This is where data needs to come into play. Looking around briefly online, I honestly couldn’t find a lot of information. I found a few teacher sites where people said students should be able to do 90 problems in 2 minutes or 200 problems in 5 minutes. Their reasoning always seemed to be “that’s how I’ve always done it”. In an effort avoid this, I did some quick data collection with my students.
Giving my students two minutes to complete as many problems as they could, I recorded the number of facts correctly answered. I tested 4 times total, the first two tests were multiplication facts 0-9. For the last two tests, the students picked their best fact.
And the mean and median of the results:
Now, what does this information mean? My class averaged just short of 50 problems in 2 minutes when testing all facts. On the strongest fact, our averages rose to just above 70.
*Two interesting results: One student actually scored higher on the mixed than on best fact. Nothing big, this student had 4 of the top 6 scores. The other interesting result was “student m”, had one of the lowest results on the 2nd mixed test (27) and the 5th highest on the best fact test (99).
I would say 70 accurate responses in 2 minutes is very fluent. So, 35 problems per minute? Might be a touch too high, but I wouldn’t go much lower.
I don’t know if this says much of anything, but I’m going to continue to track this for the rest of the semester and see what comes out of it. Finally, hopefully this will help in our discussion on implementing facts testing.


Everyone struggles with math, whether learning the multiplication tables or trying to figure out how to stretch the monthly income to pay bills. Some find mathematics easier than others, just as some find spelling easier. Some use mathematics extensively in their work, just as some make more use of hammers. Everyone, though, uses mathematics daily, and limited math proficiency leads to limited success with the dailychallenges of our society. As Sutton has said, "one of the most significant things parentscan do is to help their children understand the normalcy and the value of struggle inmathematics".
What Are Children Learning In Math?
The widespread adoption of the Common Core State Standards for Mathematics (CCSSM) presents an unprecedented opportunity for systemic improvement in mathematics education in the United States. The Common Core State Standards offer a foundation for the development of more rigorous, focused, and coherent mathematics curricula, instruction, and assessments that promote conceptual understanding and reasoning as well as skill fluency. This foundation will help to ensure that all students are ready for college and careers when they graduate from high school and that they are prepared to take their place as productive, full participants in society. Project Appleseed has supported national standards since Goals 2000 was launched nearly 20 years ago.
How Can Parents Help?
Set the Example. Project Appleseed engages parent involvement in schools. One of the most important ways parents can help a child in math is by exhibiting attitudes and values supportive of learning. "All children have twowonderful resources for learning-imagination and curiosity. As a parent, you can awaken your children to the joy of learning by encouraging their imagination andcuriosity" (Ravitch, in Kanter, 1994). Sutton (1998) offers the following suggestions:
Accept the Struggle as a normal part of doing math, just as you accept the struggle to become better in sports. Help uncover difficulties, and offer suggestions for over coming them.
Encourage Mastery. Just as it is important to repeat fundamentals again and again in sports until performed automatically, it is important to see practice in mathematics as developing mastery, not a chore or form of punishment.
Look Beyond the Grade. Math grades are often calculated on percentages of correct answers on tests and assignments accumulated during a grading period, so they may not reflect under-standing that has developed over the course of a grading period. Help focus on understanding and being able to identify specific difficulties.
Discover the Textbook. "Reading" math can be difficult, and math textbooks are often used as collections of assignments and homework problems. Help your child learn how to "read" the math textbook, see the underlying structure, and learn from the examples provided.
Help Children See the Math Around Them. Help children recognize the use of math around them in daily life, and engage them in games and activities that foster familiarity with numbers and mathematical thinking. A guide, "Helping Your Child Learn Math," is available online. The guide suggests many activities that parents can do with children (grades K-8) at home, at the grocery store, or in transit. The activities generally make use of playing cards, coins,containers, or other simple materials around the house.
Provide A Place and Resources to Study. Project Appleseed believes we must provide children with convenient,quiet, and comfortable work areas, along with whatever resources are needed to study math and complete assignments. Encourage the use of reference materials (such as dictionaries and encyclopedias), and provide a computer and calculator if possible. If a computer is not available in the home, plan regular visits to a public library or community learning center where access is available.
The computer has become a common and essential tool in learning many school subjects, particularly mathematics and science. You and your children can use the computer to:
Produce reports and assignments using word processing programs, spreadsheets, and other software.
Find information from reference materials.
Use commercial software packages that teach math skills in interesting and enjoyable ways.
Access the abundant math and homework resources and assistance freely available on the Internet.
Help With Homework. Teachers assign homework for a variety of reasons: to help students review what has been learned; to help them prepare for the next class session; to extend student exploration of topics more fully than class time permits; or to help students gain skill in self-directed learning and using resources such as libraries and reference materials.


I still remember asking that question about so many subjects in high school and college- particularly in math. I couldn’t see why I would ever to figure the area of a triangle or the volume of a cubic rectangle. Or the classic stumper of two trains leaving at different times and traveling at different speeds and when would they meet?
Why should I actually care about how a cell is comprised (or that the mitochondria is the “powerhouse of the cell”… I still remember that, and it still has given me literally zero benefit in any area of my life whatsoever). So much of my formal education was made up of a lot of little bits of information whose sole purposed seemed to be in helping me get an acceptable grade on a test… grades… don’t even get me started.
When I was still a professional teacher, I would semi-regularly get the question, “Is this going to be graded?” I don’t think I ever really flipped out, but I am sure that I did give several sermons about intrinsic value and such.
The interesting thing to me is that, in the process of creating this homestead as we want it to be, I find myself in NEED of information that was supposed to be valuable to me 15-20 years ago but wasn’t and so never really internalized.
The point isn’t that traditional schooling methods presented me with bad information. The point is that it was presented with a combination of bad timing and bad application. Timing and Application. Give me that lesson about how to calculate cubic yardage when I need to estimate the cost of pouring a concrete garage floor or filling my raised garden beds with dirt. I use mathematical skills measurement, finding area and volume, perimeter, etc., ALL THE TIME! because I build and plan and consider. But without a meaningful application (which I was lacking before) learning about how to do those things is time wasted.
So now what? Rail and complain about the lack of effectiveness of our school systems? OR do things differently?
I am happy to say that each one of my raised garden beds will, with dimensions of 4′ x 8′ x 1′, require just over one cubic yard of black dirt. A local landscaping company sells topsoil for $22/yard. We are looking at about $90 worth of dirt for the four beds. 32 square feet in each bed. One cabbage per square foot. 4 cabbages per 1/2 gallon of sauerkraut. 4 beds can grow 128 cabbages. We’re looking at roughly 16 gallons of sauerkraut worth of cabbages. $7 per quart of naturally fermented sauerkraut at the store. 4 quarts in a gallon. $28/gallon of store bought sauerkraut. My sauerkraut would cost about $5.75/ gallon. And I only have to by the dirt once. So next year it will just be the cost of seeds, which is negligible.
The math tells me it’s worth it. And NOW I see how it’s worth learning math. I am happy that I can be learning and creating with my children, and not just stuck in complaining.


Here are my paper ball ornament instructions to use leftover Christmas cards. I always feel like hoarding the beautiful cards friends send me and this DIY Christmas ornament makes a great use of them. Added bonus: it’s a little math lesson too!
Supplies for paper ball ornament
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To make this paper ball ornament you will need Christmas cards or festive card stock, double-sided tape or glue, a circle template such as a Duck Tape roll, scissors, pencil or marker, and thin ribbon or twine.
- Baker’s twine
- ¼ or ½ inch satin ribbon or tinsel metallic cord. You will need about 4 inches to make a hanging loop.
- Double sided tape ½ inch scrapbooking tape
- Choose Christmas cards to use for the paper ball ornament. You will need 20 circles for each ornament.
- I use a Duck Tape roll to trace circles. This makes exactly the right size to fit the ½ inch double-sided tape. You could make larger circles. I found making smaller circles very difficult to fold. I trace on the right side of the card so I can see what part of the design will show. (If you have a large circle paper punch, use that!)
- Cut the circles out, cutting inside your tracing line.
- On the back of each circle, draw straight lines to make an equilateral triangle. Each line should touch the edge of the circle and each other. Or you can try folding the card by estimating. You may want to make a triangle template to trace onto each circle.
- Fold the “ears” towards the printed side of the card, so that you have a triangle.
- Line up 10 of the cards and stick the ears to each other to make a straight line of cards. This means one triangle point will face up and the next one will face down.
- Make this line of 10 cards into a circle by sticking the two end ears together.
- Make two caps for the ornament. Use 5 cards and stick them together so that the points of the triangles are meeting together. Cut a 4-inch piece of ribbon and fold in half. Stick the raw ends of the ribbon into one of the caps to use for hanging. (Or use a hole puncher to make a hole in one of the ears to attach the hanger.)
- Stick the caps to the two sides of the circle you made earlier.
- Or you can use white glue to assemble the ornament. You may want to put some on a disposable dish and use a small paintbrush to apply. Hot glue will work too.
- Icosahedron from Wolfram MathWorld
- 20 DIY paper Christmas ornaments from DIY & Crafts
|Christmas card display||Christmas home tour||Christmas candy cane hobby horse|


The abbreviation “kph” means the variety of kilometers traveled in an hour, whereas “mph” is the variety of miles traveled in an hour. Convert mph to kph by taking the mph and multiply it by 1.61. The inverse method is to take the kph and multiply the determine by 0.61. In different phrases, 1 mile is 1.61 kilometers, and 1 kilometer is 0.61 miles.
The determine for kph is larger than that of the equal mph as a result of a kilometer is shorter than a mile. For example, a automobile touring 60 mph goes 96.5 kph. Conversely, a practice touring 120 kph goes 74.5 mph.
Each kph and mph could be damaged down into toes per second and meters per second. To do that for kilometers, multiply the general pace by 1,000, after which divide by 3,600. For instance, 120 kph is 120,000 meters divided by 3,600, which equals 33.Three meters per second. For mph, multiply the pace by 5,280 earlier than dividing by 3,600. For instance, 60 mph is 316,800 toes divided by 3,600, which equals 88 toes per second.
The main distinction between kph and mph is the metric system and U.S. customary items. There are 1,000 meters in a kilometer. One meter is roughly 3.Three toes, or barely greater than a yard. Subsequently, 1 kilometer is 3,280 toes. One mile is 5,280 toes, or 1,609 meters.


What do adult numeracy 'levels' mean? | National Numeracy - Adult literacy and numeracy gcse
- Views: 113 490
In England and Wales, the adult numeracy levels are measured across five 1 (equivalent to the standard expected for ages 5 to 7) up to Level 2 (GCSE A*-C). I've done the Adult numeracy and literacy certificates level 1 and level 2 and they aren't graded like GCSE papers. You just get a pass or fail. The exam is.


Curve Sketching In Calculus
Calculus quiz. Test your knowledge in calculus, integration and derivation. Note: This is only a demo, and depending on the demand, many more problems will be added. Requirements: Windows Phone 8.1, Windows Phone 8
Platforms: Windows Phone
|License: Freeware||Size: 1024 KB||Download (7): Calculus Quiz Download|
Interpolation and Regression are fundamental and important calculations in mathematics. Mr. Newton and Mr. Gauss were engaged in-depth with numerical solutions for these problems. Today, there are improved algorithms, that can solve such tasks.
InterReg allows you to do such complex calculations...
|License: Shareware||Cost: $40.70 USD||Size: 2.21 MB||Download (31): InterReg Download|
3DMath Explorer is a computer program that pilots 2D and 3D graphs of mathematical functions and curves in unlimited graphing space. It has many useful feature such as 3D curve ploting in real time, perspective drawing, graph scaling (zooming), active graph rotation, fogging effect, cubic draw,...
|License: Shareware||Cost: $45.00 USD||Size: 2.33 MB||Download (585): 3DMath Explorer Download|
This program generates a cartesian mesh [x,y,z] from a 3D curve, and a vector of associated radii.It takes four inputs, two of which are optional: * P (3D curve) = 3xN matrix with each point of the curve given in correct order and columnwise. * R (Radii) = 1xN vector with positive scalar...
|License: Shareware||Cost: $0.00 USD||Size: 174.08 KB||Download (18): GenCyl Download|
This function allows to use two different y-axes with the same data in one plot. Note, that only one curve but in two different units is shown. This is the difference to plotyy which plots two different datasets into one figure.Take a look to the screenshot and run the different examples in the...
|License: Shareware||Cost: $0.00 USD||Size: 10 KB||Download (18): addaxis_unit Download|
Radius Calculator allows you to calculate the radius, central angle, arc length, and circumference from the span / chord and rise of an arc segment. Built-in unit converter makes it to work with any length unit (including inches, feet, centimeters, meters, and many more). Simply enter the span /...
|License: Shareware||Cost: $1.99 USD||Size: 1024 KB||Download (7): Radius Calculator Download|
NEW in 1.5 - New Collectible: Lantern. Can you see in the dark? - New Collectible: Slow Down. Because sometimes life is just too fast! - New Obstacle: Jump Pad - 8 new Facts to check! - New Touch-Based input method. Enable it in the Options Screen - Even more pesky bugs fixed - Improved...
Platforms: Windows Phone
|License: Freeware||Size: 10 MB||Download (7): Chickens Can Dream Download|
SmartSound® Movie Maestro is a soundtrack creation program that allows you to easily create movie-quality soundtracks for any video project, regardless of music knowledge or computer skills. The software includes a professionally recorded music library with themes especially suited for home...
|License: Demo||Cost: $49.95 USD||Size: 12.68 MB||Download (366): SmartSound® Movie Maestro Download|
A Microsoft Windows-based service-cycle management and dispatching solution designed to automate processes involved in running your towing and recovery operation. The InTow Software Suite from OnScene Solutions is a data management solution to the towing industry. InTow Software Suite provides a...
|License: Demo||Cost: $1995.00 USD||Size: 79.75 MB||Download (124): InTow Software Suite Download|
Produces stereoscopic graphs of mathematical functions or of approximations to their 1st and 2nd order partial derivatives. Most people are able to view these stereographs without any paraphernalia and feel a true three-dimensional effect. True depth perception is due to binocular vision and the...
|License: Shareware||Cost: $15.00 USD||Size: 1.62 MB||Download (87): Stereographer Download|
EasyHDR 1.31 is a powerful utility to convert your simple photos taken with a digital camera to HDR images.Thanks to this tool your photos can become totally professional. Its methodology is to obtain photos captured from different exposures and apply tone mapping to produce surprising and...
|License: Freeware||Size: 1024 B||Download (100): EasyHDR PRO Download|
MedCalc is a complete statistical program for Windows designed to closely match the requirements of biomedical researchers. It is fast, user-friendly and reliable. MedCalc is the most user-friendly software for Receiver Operating Characteristic curve (ROC curves) analysis. The MedCalc ROC module...
|License: Shareware||Cost: $395.00 USD||Size: 16.32 MB||Download (29): MedCalc 64-bit Download|
MedCalc is a complete statistical program for Windows designed to closely match the requirements of biomedical researchers. It is fast, user-friendly and reliable.
MedCalc is the most user-friendly software for Receiver Operating Characteristic curve (ROC curves) analysis. The MedCalc ROC...
|License: Shareware||Cost: $395.00 USD||Size: 12.95 MB||Download (133): MedCalc Download|
To calculate an area S(A) of a figure A, bounded by a Jordan curve (which in our case is constructed by a cubic splineapproximation) the Monte Carlo method is applied
|License: Shareware||Cost: $0.00 USD||Size: 10 KB||Download (18): Monte Carlo method for estimating plane figure area Download|
- Offline access to 720p HD video - AirPlay support for Audio and Video - Approximate Runtime 112 min Learn the right way to process HDR from the guy who literally wrote the book on it! HDR images are like licorice - you either really like them or you don't. However, HDR isn't only about...
|License: Shareware||Cost: $4.99 USD||Size: 1.74 GB||Download (8): HDR Crash Course, by KelbyTraining.com Download|
- BigFarmNet users can easily get a complete and quick overview of the production and climate data on their farm and other locations thanks to this app. - The app allows for a free selection of the many different available values (e.g. temperature, humidity, set values or feed conversion). It is...
Platforms: Windows Phone
|License: Freeware||Size: 3 MB||Download (7): BigFarmNet App Download|
Powerful but easy-to-use graphing, curve fitting and calculating software. Graphs Cartesian (Y(x) and X(y)), polar and parametric functions, graphs of tables, equations (implicit functions), inequalities and slope fields. Up to 100 graphs in one window. Calculus features: regression analysis,...
|License: Shareware||Cost: $29.95 USD||Size: 1.38 MB||Download (672): Advanced Grapher Download|
Data Curve Fit Creator Add-in is an easy-to-use data analysis add-in for Microsoft Excel. It adds curve fitting, interpolation, and data smoothing functions to Excel. Curve fitting functions include polynomial fits and a versatile local regression (loess) function. Interpolations include...
Platforms: Windows, Windows 8, Windows 7, Windows Server
|License: Shareware||Cost: $79.95 USD||Size: 6.92 MB||Download (337): Data Curve Fit Creator Add-in Download|
This program calculates BER curve against SNR for QPSK Modulation in Gaussian Environment.It calculates 100 errors for for each SNR value before calculating BER. This gives a good approximation of BER.I hope this will help students alot.Please feel free to contact me should anyone has any queries.
|License: Freeware||Size: 10 KB||Download (22): BER Curve for QPSK in Gaussian Environment Download|
Calculate and plot BER curve against SNR for BPSK Modulation in Gaussian Environment.It calculates 100 errors to Calculate BER for every SNR value to ensure better approximation.I hope that this help students of signal processing and communications...
|License: Freeware||Size: 10 KB||Download (21): BER Curve for BPSK in Gaussian Environmen Download|


Gunn High senior wins $20,000 scholarship
Gunn High School senior Alex Liu won a $20,000 scholarship at the 2010 Siemens Competition in Math, Science & Technology. Liu placed fifth out of six individuals who participated in the competition. Liu’s project, which featured a new technique to extract meaningful information from genomic data, explored why certain people’s immune systems reject organ transplants. Roughly 600 hours went into the project. The Siemens Competition was launched in 1998 to recognize the nation’s brightest math and science students.


The Biggest, Bestest Book of Sudoku (Paperback)
It’s the marriage of Workman’s bestselling Sudoku series and a format that gives fans the joy of more, more, more! The Biggest Bestest Book of Sudoku features more than 1,000 sudoku puzzles ranging in difficulty from easy to extra-extra-hard. Each puzzle is handcrafted (not computer generated, like most generic sudoku books) by the experts at Nikoli Publishing, the Japanese creators of the game, so solving one is like pitting your mind against that of a sudoku master. And unlike Workman’s previous small-sized sudoku books, The Biggest Bestest Book of Sudoku will come in a larger 8"x10" format and pack in three times as many puzzles to keep readers happy and busy.


Need Help Picking Players For Gameweek 1 in FPL? Our Very Own ‘Player Value’ Stat Can Help
My ‘Player Value’ Stat Explained…
Picking players at the beginning of each season is always difficult and at times, can be a little stressful if we’re honest with ourselves.
A large majority of us will obsess over our teams, chopping and changing all the way to the gameweek 1 deadline (draft number 162 going in the bin)… One stat I feel that can help make those decisions easier, is ‘Player Value’ – but not as you know it.
Whilst it may make sense, I believe the ‘Player Value’ figure on the official website (points per million: calculated simply by taking the total points and dividing it by the price) doesn’t really totally represent ‘Player Value’ – it doesn’t take the varying prices paid by FPL managers over the course of a season, average games played or average points per game (PPG) of the players, into account.
It literally just tells you how many points that player will give you per every 1 million you spend, which to me, doesn’t incorporate all the facets that you need to determine whether a player is good value for money or not.
My ‘Player Value’ figure is calculated with these additional bits of information in mind;
Player Value = PPG divided by median price multiplied by 100
For example; PPM would calculate Robertson (31.8) and Alexander-Arnold (31.9) as being pretty much the same value, despite Alexander Arnold having been roughly around £1m cheaper all last season and playing fewer games than Robertson – Trent played 29 games in the PL whereas Robertson played 36. If Trent had played 36 games, he would have outscored Robertson at the PPG ratio he was averaging. So surely Trent should be better value than just 0.1 no?
Well with my formula, he is, and rightly so. PPG is a good indicator because it tells us how many points on average the player scores per game he actually plays. If you only look at total points (as PPM does), then it ignores the numbers of games played and in my mind, creates what seems to be unfair reflections of what should constitute ‘player value’.
So, Trents PPG was 6.77 and Robertson’s was 5.96. If we also include the median (or average) price paid over the course of the season – this accounts for the average price people paid over the season (again, PPM does not account for this) – 5.4 for Trent and 6.35 for Robbo then:
Trent: 6.77 divided by 5.4 multiplied by 100 = 125
Robertson: 5.96 divided by 6.35 multiplied by 100 = 94
For another reference, PPM has Neil Etheridge (33.5) as being better value than both Robertson and Trent despite them both comfortably outscoring him with less games for not too much higher a price. With my formula, he isn’t better value and again, I believe rightly so:
Neil Etheridge: 4.05 divided by 4.6 multiplied by 100 = 88.10
By any stretch of the imagination, I’m not pretending like this is an exact science and that my ‘Player Value’ figure is absolute – I just wanted to provide the fantasy football community with another indicator that may help make a difficult selection process a little easier. Points per million is a perfectly acceptable view of ‘Player Value’, but I feel my formula gives a more realistic and representative view of it.
So, I’ve gathered the various stats from the official Fantasy Premier League website of the top 10 goalkeepers, the top 15 defenders, top 20 midfielders and top 15 forwards from last season and calculated a ‘Player Value’ figure using the data I collated.
I’ve also added in the new player prices for the new season to see how the new prices will affect value, if they achieved the same points and stats as they did last year, as a comparative tool.
Hit the link below to see what it looks like and to download yourself a copy >> copy-of-player-value-comparison-fpl
Or if you’d prefer, here are the screenshot images:
Top 20 Midfielders
Top 15 Forwards
Top 10 GKs and top 15 DEFs from last year


Like many parents, I anxiously await the beginning of the school year. Not so I can get the kids out of my hair (I have a job that does that already), but because a) It cuts down on the cost of day care; and b) I like to regale my children with tales of heartbreaking woe from my childhood.
“You think a little math homework is bad? When I was your age, we had math homework assigned before recess that was due when we got back inside! You ever try doing long division on a swing? Or fractions while going down a slide? THAT is homework my miniature friend!”Continue reading


About the competition
Niels Henrik Abels mathematical competition is a competition in mathematical problem-solving for students in the Norwegian high school system.
Today, the competition consists of two selection rounds and a final round. In the first round, the participants receive 20 problems, each with a choice of five answers, to be solved in 100 minutes. Five points are awarded for every correct answer, one point for every blank answer, and no points for every wrong answer. Thus, the expected score is the same if one guesses or simply do not answer (that is, 20 points). The maximal score is 100 points.
The best 10% of the participants are granted entry to the second round. Here there are 10 problems, each with an answer in nonnegative integers (0-999). The time limit is again 100 minutes. 10 points are awarded for every correct answer, so the maximal score is 100 points.
The results from the initial rounds are summed, and the top 20 students, and possibly a few more, are invited to the final round. Ultimately, however, there must be 16 students in the final who are qualifiable to the IMO (the International Mathematical Olympiad). In the finals, the students have four hours to solve four problems. These problems do not only require correct answers, but also proper argumentation and proof.


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PalmaryCalc is a calculator with a user-friendly interface. It is all in one: from a simple calculator to a scientific, conversion functions (from cooking to astronomical), credit, base number conversions between binary, octal, decimal, and hexadecimal; 32-bit, 16-bit, and 8-bit integer math calculations and conversions; logical and bit-manipulation operations, currency conversion, or any other calculator configuration that you desire. The variety of input methods (including RPN) enables you to perform almost all operations you need.
- User-friendly interface
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- Hi Res (320x320) support
- 15-digit display
- 35 basic math and trigonometric functions
- Mortgage rate calculations
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- 3 different input methods (simple, algebraic, RPN)
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PalmaryCalc is a free trial software application from the Calculators & Converters subcategory, part of the Business category.
The app is currently available in English, German and it was last updated on 2005-03-01. The program can be installed on Palm OS 4.0, Palm OS 5.0, Palm OS 6.0.
PalmaryCalc (version 1.0.1) has a file size of 639.92 KB and is available for download from our website.
Just click the green Download button above to start. Until now the program was downloaded 68 times.
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2 edition of Lial Fin Mth & Calc W/Apps 4e, Lial Ssm Fin Mth & Calc W/Apps found in the catalog.
Lial Fin Mth & Calc W/Apps 4e, Lial Ssm Fin Mth & Calc W/Apps
by Addison Wesley Publishing Company
Written in English
|The Physical Object|
The late war between the United States and Great Britain
Golden Treasury of Spanish Prose
Where rise the mountains
Slavery in Mississippi.
The shores of tomorrow
University Education in Computing Science
synthesis and spectroscopic properties of some molecular hydrogen complexes of osmium.
U.S. Tea Board meets
Elements of political economy.
Earnings of bank employees, spring and summer of 1943.
Math, Engineer, Finance, Trig, Stat, Lookup, Logic, Date, Text, and Info functions, just to name a few. Calc XLS has more than (see our web site for a complete list of functions).Operating System: Ios The solutions of Fabricio works just fine. A very common usecase of calc is add % width and adding some margin around the element.
One can do so with. Financial Calculators, Inc. dba CalcXML PO Box Salt Lake City, Utah P: () With CalcMe you can perform and graphically visualize your mathematical calculations online. Handwrite your geometric objects and functions, and much more.
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high school math. social sciences. literature and english. foreign languages. Free Downloads. Free Windows, iPhone, iPad and Android versions are available for download Mortgage Calculator for Windows.
Calculator and Results. A simple calculator app for basic arithmetic operations like addition, multiplication, subtraction and division. Review DISCLAIMER before using calculator.
Disclaimer: Option and derivative calculations are provided by Montgomery Investment Technology, Inc. Today is, so the number of days until is.
Countdown timer to 26 May. It can automatically count the number of remaining days, months, weeks and hours. Hundreds of user-friendly automatic calculations for all walks of life, from home and recreation to science and engineering, and all with built-in unit conversion.
New USAF WAPS Promotions Calculator - December Feb Changes to USAF WAPS Promotions Calculators EPR Stratification Restrictions and Forced Distribution. Any online guides/tutorials out there. I have it installed on my Ti silver edition with all other apps needed to work.
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Imagine a cloud-based app designer enabling you to create apps without having to do any programming. P&L Calculations. Following is an example of how P&L is calculated when there are multiple executions for one position.


In recent years, subdivision has emerged as a major geometric modeling technique. Algorithms for generating subdivision curves are often specified in terms of iterated matrix multiplication. Each multiplication maps a globally indexed sequence of points that represents a coarser approximation of the curve onto a longer sequence that represents a finer approximation. Unfortunately, this use of matrices and indices obscure the local and stationary character of typical subdivision rules.
We introduce parametric context-sensitive L-systems with affine geometry interpretation as an alternative technique for specifying and generating subdivision curves. This technique is illustrated using Chaikin, cubic B-spline, and Dyn-Levin-Gregory (4-point) subdivision schemes as examples. L-systems formalize subdivision algorithms in an intuitive, concise, index-free manner, reflecting the parallel and local character of these algorithms. Furthermore, L-system specification of subdivision algorithms directly leads to their computer implementation.
P. Prusinkiewicz, F. Samavati, C. Smith, R. Karwowski: L-system description of subdivision curves. International Journal of Shape Modeling 9 (1), pp. 41-59.
Download PDF here (377 kb)Back to Publications


Imagine you have found the perfect house for your family. The yard, the finished basement, the two-car garage, all the bedrooms, and bathrooms — it’s the ideal space. But there is a problem. The standard 20% down payment is more than you can afford.
But wait! You don’t need to walk away because Private Mortgage Insurance (PMI) can help you get that perfect home by assisting you with down payment through your monthly mortgage payments.
PMI is a sum added to your monthly mortgage payment that provides insurance for the lender. After your payments have reduced the principle of the loan to 80%, meaning you have built 20% equity into the home, you can ask your lender to cancel the PMI. When the principle is down to 78%, the lenders will be required to cancel the PMI.
If you use tools and information to help calculate PMI you’ll need, it will help you estimate your total payment — mortgage and PMI included. To do this accurately, follow these steps:
1. Determine the price range of the homes you are interested in
PMI moves up and down based on the mortgage amount. Let’s take a range of $200,000 to $400,000.
2. Determine what amount you can put down
For this example, $20,000 is your maximum down payment.
3. Determine what percentage of the purchase price your down payment is
Divide the purchase price into your down payment. If the purchase price is $200,000, your $20,000 down payment is equal to .1, or 10%. If the price is $400,000, then $20,000 is equal to .5, or 5%.
4. Calculate the loan-to-value ratio
Take the percentage from the previous step and convert it into a whole number. For example, .5 or 5% becomes 5. Subtract this number from 100 (100 – 5 = 95). Now, take the remainder and convert it into a percentage. If the remainder is 95, the percentage is 95%.
5. Calculate the PMI
Enter these figures into an online PMI calculator online to get the yearly cost of PMI.
6. Determine the monthly payment
Divide this number by 12 (for 12 months) then add the number to the monthly mortgage payment to see what your total monthly payment will be.
If you’re interested in buying a home, Private Mortgage Insurance, and learning more about how to calculate PMI, download our eBook now.


The Clever Chauffer
There’s a story about how Albert Enstein was traveling to universities in a chauffer-driven car, delivering tectures on his theory if relativity.
One day while in transit, the chauffer remarked, “Dr. Einstein, I’ve heard you deliver that lecture about 30 times. I know it by heart ang bet I should give it myself.”
“Well, I’ll give you the chance, “said Einstein, “They don’t know me at the next school, so when we get there I’ll put on your cap, and you introduce yourself as and give the lecture.”
The chauffer delivered Einstein’s lecture flawlessly. When he finished, he started to leave, but one of the proffesors stopped him and asked a complex question filled with mathematical equations and formulas. The chauffer thought fast.
“The solution to that problem is so simple,” he said, “I’m surprise you have to ask me. In fact, to show you just how simple it is, I’m going to ask my chauffer to come up here and answer your question.”
(Taken from : http://hikaridesu.multiply.com/journal/item/25/Spoof_Text_XD)


The other day, after I had graded a couple of days worth of work for the girls, I sat down with them to look at anything they missed. Â I had put a red dot beside anything they missed on homework, so that they could rework it. Â I want to make sure that they are comprehending the concept, not just checking it off as another page done. Sometimes we have to revisit an entire concept. Â Sometimes, especially with math, it is simply that they have forgotten a step. Â But the formula is just as important as the answer because it shows the relationship between the numbers.
The other day after working through one of these recheck days with the girls, we got a little hung up on math with my younger daughter. We worked through it but not without some sweat. :-)
Later that day I was struck how much I am just like that with God. I truly desire to do what God is asking me to do or teaching me to do. But sometimes, I catch myself relearning certain steps or concepts that God has been so patient to teach me. Â I can just hear him, “Ok Darlene, let’s try this one more time.” Â And like my daughter, I reply to God, “but I’ve already learned that can’t we just move along?” Â God reminds me that I have forgotten a step or maybe I missed it altogether. Â The proof is just not there that I’ve gotten it yet.
He reminds me that what I am learning through the process is just as important as the final result.
It is little moments like this that I realize God had a much bigger plan, than my being obedient in homeschooling the kids. He has so much to teach me (if I will listen). Â I’m praying that I don’t miss any of the red dots he has marked. Â I pray that I will approach these lessons with a more willing spirit to relearn the things I thought I’d already learned.


How to Eat Chocolate Indefinitely (gif version)
A very tasty application of the geometrical illusion discussed here [CJH].
German mathematician David Hilbert discovered the curve that bears his name in the early 1900’s. It is an example of a “space-filling” curve: it literally covers every point in a square. Like fractals, it is generated in iterations. Hilbert with Ladders(below) is output generated from a modified Hilbert algorithm that also draws other shapes and ladders at points along the Hilbert Curve.
The Hilbert space filling curve is a one dimensional curve which visits every point within a two dimensional space. It may be thought of as the limit of a sequence of curves which are traced through the space.
The basic pattern is a curve which starts near the bottom left corner of a box and terminates near the bottom right corner. It has a kink in it, the kink takes it into the top left and top right of the box.
Don Relyea, based on Professor Cumming of Napier University, Edinburgh, UK works and with a small amount of effort adding several of his drawing routines, was able to generate fantastic results.
If you like to try yourself, it is possible to it here:
Love that book…
Ah you’ll have to view the fullsize for this one! After finishing The Way of Kings by Brandon Sanderson I kind of got an itch to design the characters, so I’ve been working on these on and off for the past few weeks. Shallan is my absolute favorite, and I’m pretty happy with her design! And there was no way Adolin wasn’t going to look like he just walked out of an anime.


SEEDS BY SOL
With the support of an Ontario Arts Council grant, I have constructed a large wooden bowl. This piece is a statement to the deep cultural significance of bowls and seeds to people all over the world and throughout history.
I have constructed the bowl by replicating the spirals created by the seeds in sunflower heads, using each spiral as a structural component. This entails a study of the amazing mathematics of sunflowers, which follows the Fibonacci sequence, the golden ratio and the golden angle.


Infinity is certainly a strange mathematical concept. It is not like many of the numbers that people are used to dealing with on a day to day basis. However, it is extremely helpful to have as a tool for the average physicist. Today I want to pass a math joke off to you that will help you understand some of the most basic of infinite series.
First off, what is an infinite series?
Let’s say I add 1 to 1 one time. This is represented as 1+1 and is equal to 2. If I add 1 to 1 two times then I can say 1+1+1=3. If I add 1 to 1 an infinite amount of times I get 1+1+1+…= ? because this series does not converge! There are several tests in calculus and other kinds of mathematics to help thinkers and scientists of all types discern if different kinds of series and additions converge. Rather than get bogged down in the convergence of this moment and talking about how these things can be proven let us take a look instead at an example of a series that does converge.
If I add + I will get . This can be shown as + = + = = . If I add to that, or half of what I added the last time [* = = ], we will see that + = + = = . So exciting! Now let’s do this again, and this time see if you notice the pattern. + = + = = . If you haven’t spotted the pattern yet and want to do so on your own, try to add the next value () and see if you spot it! Spoilers are in the next paragraph.
As we continue to do this an infinite amount of times each addition increases the denominator, the number in the bottom of the fraction, by a power of 2 ( … ). However the numerator, or the upper number of the fraction, is always the denominator minus 1. This means as we do this for the n = 1000000 th = time the numerator will be while the denominator is simply . Do this an infinite amount of times and . This is as close to the value of 1 as one can truly get.
Now for a math joke that you can share yourself!
A mathematician walks into a bar. They order a beer. They are followed by a second mathematician who orders of a beer who is followed by another mathematician who orders half of the last mathematicians order ( of a beer) who is followed by an infinite amount of mathematicians who order half of the last order before them. The bartender gets flustered and pours two drinks.
If you are looking for me to Taylor more series for your calculus needs I would be infinitely delighted to continue this line of thinking! Look for future posts regarding reflections, absorptions, and polarization in the upcoming weeks for how this concept can be related to different aspects of physics!