clVector.StdDev Method

Overload List

#	Signature	Description
1	Double StdDev	Standard deviation.
	└ indexed: Double StdDev(Int32 Index, Int32 Len)
2	Double StdDev(Double ASum, Double aSumSqr)	Returns the standard deviation of all calling object elements.
	└ indexed: Double StdDev(Double ASum, Double aSumSqr, Int32 Index, Int32 Len)

Overload 1: Double StdDev

Standard deviation.

Returns: Double

Remarks:

Calculate the standard deviation of all calling object elements. The result is a real value. An exception is raised if calling vector Dew.Math.clVector.Complex property is true.

Examples

clVector a;
double c;
double aMean;
a.CopyFromArray(TDoubleArray.Create(1,2,3,4));
Caption = FloatToSTr(a.StdDev);

See Also: clVector.Mean

Indexed: Double StdDev(Int32 Index, Int32 Len)

Returns the standard deviation of calling object elements [Index]..[Index+Len-1].

#	Name	Type	Description
1	Index	Int32	start index
2	Len	Int32	element count

Returns: Double

Remarks:

An exception is raised if calling object Dew.Math.clVector.Complex property is true or if array borders are overrun/underrun.

Overload 2: Double StdDev(Double ASum, Double aSumSqr)

Returns the standard deviation of all calling object elements.

#	Name	Type	Description
1	ASum	Double	output sum
2	aSumSqr	Double	scalar

Returns: Double

Remarks:

The sum and the sum of squares of all calling object elements must be passed as parameters. An exception is raised if calling object Dew.Math.clVector.Complex property is true.

Indexed: Double StdDev(Double ASum, Double aSumSqr, Int32 Index, Int32 Len)

Returns the standard deviation of calling object elements [Index]..[Index+Len-1].

#	Name	Type	Description
1	ASum	Double	output sum
2	aSumSqr	Double	scalar
3	Index	Int32	start index
4	Len	Int32	element count

Returns: Double

Remarks:

The sum and the sum of squares of the coresponding elements must be passed as parameters. An exception is raised if calling object Dew.Math.clVector.Complex property is true or if array borders are overrun/underrun.