VF_subV_chi2VD_subV_chi2VE_subV_chi2
FunctionSubtract two vectors and calculate the c2 merit function
Syntax C/C++#include <VFmath.h>
float VF_subV_chi2( fVector Z, fVector X, fVector Y, uifVector InvVar,  size );
C++ VecObj#include <OptiVec.h>
T vector<T>::subV_chi2( const vector<T>& X, const vector<T>& Y, const vector<T>& InvVar );
Pascal/Delphiuses VFmath;
function VF_subV_chi2( Z, X, Y, InvVar:fVector; size:UIntSize ): Single;
CUDA function C/C++#include <cudaVFmath.h>
int cudaVF_subV_chi2( float *h_RetVal, fVector d_Z, fVector d_X, fVector d_Y, fVector d_InvVar, ui size );
int cusdVF_subV_chi2( float *d_RetVal, fVector d_Z, fVector d_X, fVector d_Y, fVector d_InvVar, ui size );
float VFcu_subV_chi2( fVector h_Z, fVector h_X, fVector h_Y, fVector h_InvVar, ui size );
CUDA function Pascal/Delphiuses VFmath;
function cudaVF_subV_chi2( var h_RetVal:Single; d_Z, d_X, d_Y, d_InvVar:fVector; size:UIntSize ): IntBool;
function cusdVF_subV_chi2( d_RetVal:PSingle; d_Z, d_X, d_Y, d_InvVar:fVector; size:UIntSize ): IntBool;
DescriptionZi = Xi - Yi
c2 = Summe( 1/si2 * (Zi)2 )

This function saturates infinities into HUGE_VAL and treats input values of ±NAN as ±HUGE_VAL. The reasoning behind this is that V?_subV_chi2 finds its main use inside nonlinear fitting routines. If the fitting routine tries a bad parameter set, you want it to get the feedback that the guess was far off; you do not want it to be punished by an exception or programme crash.

Error handlingnone
Return valuec2 merit function of the difference of the two vectors
See alsoVF_subV,   VF_chi2,   VF_subV_ssq,   VF_subV_chiabs,   chapter 13 of http://www.optivec.com/matfuncs/

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