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  2. OpenFormula - Wikipedia

    en.wikipedia.org/wiki/OpenFormula

    This allows spreadsheet applications to add new functions, without interfering with current standard functions, future standard functions, or functions defined by other applications. As a result, different applications can add new functions without interfering with others; once a consensus arises about the new function, it can be standardized.

  3. Data Analysis Expressions - Wikipedia

    en.wikipedia.org/wiki/Data_Analysis_eXpressions

    Data Analysis Expressions (DAX) is the native formula and query language for Microsoft PowerPivot, Power BI Desktop and SQL Server Analysis Services (SSAS) Tabular models. DAX includes some of the functions that are used in Excel formulas with additional functions that are designed to work with relational data and perform dynamic aggregation .

  4. Step function - Wikipedia

    en.wikipedia.org/wiki/Step_function

    The product of a step function with a number is also a step function. As such, the step functions form an algebra over the real numbers. A step function takes only a finite number of values. If the intervals , for =,, …, in the above definition of the step function are disjoint and their union is the real line, then () = for all .

  5. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).

  6. Power Query - Wikipedia

    en.wikipedia.org/wiki/Power_Query

    Power Query was first announced in 2011 under the codename "Data Explorer" as part of Azure SQL Labs. In 2013, in order to expand on the self-service business intelligence capabilities of Microsoft Excel, the project was redesigned to be packaged as an add-in Excel and was renamed "Data Explorer Preview for Excel" [4], and was made available for Excel 2010 and Excel 2013. [5]

  7. Heaviside step function - Wikipedia

    en.wikipedia.org/wiki/Heaviside_step_function

    The Heaviside step function, or the unit step function, usually denoted by H or θ (but sometimes u, 1 or 𝟙), is a step function named after Oliver Heaviside, the value of which is zero for negative arguments and one for positive arguments. Different conventions concerning the value H(0) are in use.

  8. Regulated integral - Wikipedia

    en.wikipedia.org/wiki/Regulated_integral

    A real-valued function φ : [a, b] → R is called a step function if there exists a finite partition = {= < < < =} of [a, b] such that φ is constant on each open interval (t i, t i+1) of Π; suppose that this constant value is c i ∈ R. Then, define the integral of a step function φ to be

  9. Formula language - Wikipedia

    en.wikipedia.org/wiki/Formula_language

    to provide default values for fields, to transform the data entered by the user (like stripping off redundant spaces) and to validate this data. to get a list of values from a Notes database or even from a relational database (using ODBC). This may be used to provide a user with a list of values to choose from. to process a set of documents.