System.Math.StdDev

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Delphi

function StdDev(const Data: array of Single): Single;
function StdDev(const Data: array of Double): Double;
function StdDev(const Data: array of Extended): Extended;

C++

extern DELPHI_PACKAGE float __fastcall StdDev(float const *Data, const int Data_Size)/* overload */;

Properties

Type	Visibility	Source	Unit	Parent
function	public	System.Math.pas System.Math.hpp	System.Math	System.Math

Description

Returns the sample standard deviation for elements in an array.

StdDev calculates the sample standard deviation (the square root of the sample variance) of all values in the Data array parameter. In C++, Data_Size indicates the index of the last element in the array (one less than the number of elements).

See Also

• TotalVariance

• Variance

• Business And Finance Routines

Code Examples

• RandG (Delphi)