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 FileMaker Pro Custom Functions

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Standard_Deviation( Field ; MaxLoopCount ; StartIndex ; StdDeviation ; ArithMeanValue )

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  Average rating: 4.1  (40 votes)
  Discuss this Custom Function

Kevin Woods, KWoods
http://www.RivieraCouches.co.uk

Calculate the standard deviation of a set of numbers.

Sample Input:
Standard_Deviation ( Table1::NumberField ; Get( FoundCount ) ; 1 ; 0 ; Arithmetic_Mean ( Table1::NumberField ; Get( FoundCount ) ; 1 ; 0 ) ) ;
Sample Output:
1.5


 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Description:

Calculates the standard deviation of a set of numbers, by recursively calling this function for each row in a Found Set.
Use the Arithmetic_Mean function to calculate the ArithMeanValue.

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it

Discuss:

How is this and the Arithmetic_Mean function preferable to using a summary field defined as Standard Deviation or Average - or the corresponding Stdev() and Average() aggregate functions?

comment, VR
August 28, 2010 7:19pm

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