TRTAlign Namespace Reference

Classes
class	HistoChisqProjection

Functions
double	binwidth (1)
double	gausfunc (double *x, double *par)

Function Documentation

binwidth()

double TRTAlign::binwidth

(

1

)

gausfunc()

double TRTAlign::gausfunc	(	double *	x,
		double *	par
	)

Definition at line 52 of file TRTAlignHistoChisqProjection.cxx.

  {
    double integral = par[0] ;
    double mean  = par[1] ;
    double sigma = par[2] ;
    
    double xi   = (x[0] - mean)/sigma ;
    static double sqrt2pi = sqrt(2*M_PI) ;
    double norm = integral * binwidth / ( sigma*sqrt2pi ) ;
    
    return norm * exp(-0.5*xi*xi) ;
  } ;