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Use of a user-defined function sq(x) in Microsoft Excel. The named variables x & y are identified in the Name Manager. The function sq is introduced using the Visual Basic editor supplied with Excel. Subroutine in Excel calculates the square of named column variable x read from the spreadsheet, and writes it into the named column variable y.
An n-bit LUT can encode any n-input Boolean function by storing the truth table of the function in the LUT. This is an efficient way of encoding Boolean logic functions, and LUTs with 4-6 bits of input are in fact the key component of modern field-programmable gate arrays (FPGAs) which provide reconfigurable hardware logic capabilities.
A spreadsheet consists of a table of cells arranged into rows and columns and referred to by the X and Y locations. X locations, the columns, are normally represented by letters, "A," "B," "C," etc., while rows are normally represented by numbers, 1, 2, 3, etc. A single cell can be referred to by addressing its row and column, "C10".
Database systems usually implicitly create an index on a set of columns declared PRIMARY KEY, and some are capable of using an already-existing index to police this constraint. Many database systems require that both referencing and referenced sets of columns in a FOREIGN KEY constraint are indexed, thus improving performance of inserts ...
VisualEditor will update the formula as you type it, so you can see how it will look as you make changes. Once you are happy with the formula, click the "Done" button. To edit an existing mathematical formula on the page, click on it and then click on the "Σ" icon that appears. This will open up the formula window, where you make changes.
The figure shows the Visual Basic code for a subroutine that reads each member of the x-column (named column variable x), calculates its square, and writes this value into the corresponding y-column (also a named column variable). The y-column contains no formula because its values are calculated in the subroutine and simply written in.
Column labels are used to apply a filter to one or more columns that have to be shown in the pivot table. For instance if the "Salesperson" field is dragged to this area, then the table constructed will have values from the column "Sales Person", i.e., one will have a number of columns equal to the number of "Salesperson". There will also be ...
Column titles can optionally show options to control the layout of the column. Multithreaded calculation of formulae, to speed up large calculations, especially on multi-core/multi-processor systems. User Defined Functions (UDF), which are custom functions written to supplement Excel's set of built-in functions, supports the increased number of ...