| VF_meanvarwW | VD_meanvarwW | VE_meanvarwW |
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| Function | Mean and variance with weights |
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| Syntax C/C++ | #include <VFmath.h>
float VF_meanvarwW( float *Var, fVector X, fVector Wt, ui size ); |
| C++ VecObj | #include <OptiVec.h>
T vector<T>::meanvarwW( T *Var, const vector<T>& Wt ); |
| Pascal/Delphi | uses VFmath;
function VF_meanvarwW( var variance:Single; X, Wt:fVector; size:UIntSize ): Single; |
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| CUDA function C/C++ | #include <cudaVFstd.h>
int cudaVF_meanvarwW( float *h_RetValMean, float *h_RetValVariance, fVector d_X, fVector d_Wt, ui size );
int cusdVF_meanvarwW( float *d_RetValMean, float *d_RetValVariance, fVector d_X, fVector d_Wt, ui size );
float VFcu_meanvarwW( float *h_RetValVariance, fVector h_X, fVector h_Wt, ui size );
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| CUDA function Pascal/Delphi | uses VFstd;
function cudaVF_meanvarwW( var h_RetValMean, h_RetValVariance:Single; d_X, d_Wt:fVector; size:UIntSize ): IntBool;
function cusdVF_meanvarwW( d_RetValMean, d_RetValVariance:PSingle; d_X, d_Wt:fVector; size:UIntSize ): IntBool;
function VFcu_meanvarwW( h_X, h_Wt:fVector; size:UIntSize ): Single;
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| Description | mean = (1 / sum( Wti )) * sum( Xi * Wti )
var = (1 / sum( Wti )) * sum( Wti * (Xi - mean)2 )
The weighted mean is returned and the variance stored at the address passed as "Var" (C/C++) or in the variable "variance" (Pascal/Delphi). |
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| Return value | mean of the vector elements. |
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