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X-Hacker.org- SuperLib 3.50 - function avariance()
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FUNCTION AVARIANCE()
Short:
------
AVARIANCE() Determines the variance of an array with condition
Returns:
--------
<nVariance> => Array variance
Syntax:
-------
AVARIANCE(aTarget,[bCondition])
Description:
------------
<aTarget> is the target array. Normally an array of
numeric values. [bCondition] is an optional codeblock used to
select a subset of the array. This could be used to filter out
0's or non-numeric elements. The block must accept an array
element as a parameter, and return true or false <expL> to
determine if this element is part of the desired subset.
Examples:
---------
v := AVARIANCE(aSales)
v := AVARIANCE(aSales,{|e|valtype(e)=="N".and.e<>0})
Source:
-------
S_ASTATS.PRG
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