TCorr Class Reference

#include <xmath.h>

Collaboration diagram for TCorr:

Public Member Functions
	TCorr ()
	TCorr (const TFltV &ValV1, const TFltV &ValV2)
	TCorr (TSIn &)
void	Save (TSOut &)
TCorr &	operator= (const TCorr &)
double	GetCorrCf () const
double	GetCorrCfPrb () const
TStr	GetStr () const

Static Public Member Functions
static PCorr	New (const TFltV &ValV1, const TFltV &ValV2)
static PCorr	Load (TSIn &SIn)

Private Attributes
TCRef	CRef
int	ValVLen
double	CorrCf
double	CorrCfPrb
double	FisherZ

Friends
class	TPt< TCorr >

Detailed Description

Definition at line 269 of file xmath.h.

Constructor & Destructor Documentation

TCorr::TCorr ( )

inline

Definition at line 276 of file xmath.h.

{}

TCorr::TCorr	(	const TFltV &	ValV1,
		const TFltV &	ValV2
	)

Definition at line 554 of file xmath.cpp.

References TSpecFunc::BetaI(), CorrCf, CorrCfPrb, FisherZ, IAssert, TVec< TVal, TSizeTy >::Len(), and ValVLen.

                                                  :
  ValVLen(ValV1.Len()), CorrCf(), CorrCfPrb(), FisherZ(){
  static const double TINY=1.0e-20;
  IAssert(ValV1.Len()==ValV2.Len());

  // calculate the means
  double MeanVal1=0; double MeanVal2=0;
  {for (int ValN=0; ValN<ValVLen; ValN++){
    MeanVal1+=ValV1[ValN]; MeanVal2+=ValV2[ValN];}}
  MeanVal1/=ValVLen; MeanVal2/=ValVLen;

  // calculate correlation coefficient
  double yt, xt;
  double syy=0.0; double sxy=0.0; double sxx=0.0;
  {for (int ValN=0; ValN<ValVLen; ValN++){
    xt=ValV1[ValN]-MeanVal1;
    yt=ValV2[ValN]-MeanVal2;
    sxx+=xt*xt;
    syy+=yt*yt;
    sxy+=xt*yt;
  }}
  if (sxx*syy==0){
    CorrCf=0; //** not in numerical recipes - check why (pojavi se, ko so same nicle)
  } else {
    CorrCf=sxy/sqrt(sxx*syy);
  }
  // calculate correlation coefficient significance level
  double df=ValVLen-2;
  double t=CorrCf*sqrt(df/((1.0-CorrCf+TINY)*(1.0+CorrCf+TINY)));
  CorrCfPrb=TSpecFunc::BetaI(0.5*df,0.5,df/(df+t*t));
  // calculate Fisher's Z transformation
  FisherZ=0.5*log((1.0+(CorrCf)+TINY)/(1.0-(CorrCf)+TINY));
}

Here is the call graph for this function:

TCorr::TCorr ( TSIn &  )

inline

Definition at line 280 of file xmath.h.

References Fail.

{Fail;}

Member Function Documentation

double TCorr::GetCorrCf ( ) const

inline

Definition at line 286 of file xmath.h.

{return CorrCf;}

double TCorr::GetCorrCfPrb ( ) const

inline

Definition at line 287 of file xmath.h.

{return CorrCfPrb;}

TStr TCorr::GetStr

(

)

const

static PCorr TCorr::Load ( TSIn &  SIn )

inlinestatic

Definition at line 281 of file xmath.h.

{return new TCorr(SIn);}

static PCorr TCorr::New ( const TFltV &  ValV1, const TFltV &  ValV2  )

inlinestatic

Definition at line 278 of file xmath.h.

                                                          {
    return PCorr(new TCorr(ValV1, ValV2));}

TCorr& TCorr::operator= ( const TCorr &  )

inline

Definition at line 284 of file xmath.h.

References Fail.

{Fail; return *this;}

void TCorr::Save ( TSOut &  )

inline

Definition at line 282 of file xmath.h.

References Fail.

{Fail;}

Friends And Related Function Documentation

friend class TPt< TCorr >

friend

Definition at line 269 of file xmath.h.

Member Data Documentation

double TCorr::CorrCf

private

Definition at line 272 of file xmath.h.

Referenced by TCorr().

double TCorr::CorrCfPrb

private

Definition at line 273 of file xmath.h.

Referenced by TCorr().

TCRef TCorr::CRef

private

Definition at line 269 of file xmath.h.

double TCorr::FisherZ

private

Definition at line 274 of file xmath.h.

Referenced by TCorr().

int TCorr::ValVLen

private

Definition at line 271 of file xmath.h.

Referenced by TCorr().

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The documentation for this class was generated from the following files:

• glib-core/xmath.h
• glib-core/xmath.cpp