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Return variance of values
Source position: math.pp line 477
function variance( |
const data: array of Single |
):Float; |
const data: PSingle; |
const N: Integer |
):Float; |
const data: array of Double |
):Float; |
const data: PDouble; |
const N: Integer |
):Float; |
const data: array of Extended |
):Float; |
const data: PExtended; |
const N: Integer |
):Float; |
Variance returns the variance of the values in the data array. It returns zero if there is only one value.
The second form of the function accepts a pointer to an array of N values.
None.
|
Return total varians of values |
|
|
Return standard deviation of data |
|
|
Return mean value of array |
Program Example50; { Program to demonstrate the Variance function. } { @ should return typed pointer } {$T+} Uses math; Var I : 1..100; ExArray : Array[1..100] of Float; V : float; begin Randomize; for I:=low(ExArray) to high(ExArray) do ExArray[i]:=(Random-Random)*100; V:=Variance(ExArray); Writeln('Variance : ',V:8:4); V:=Variance(@ExArray[1],100); Writeln('Variance (b) : ',V:8:4); end.