GETMath2.cxx

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// =================================================
//  GETMath Class
//
//  Author:
//    Genie Jhang ( geniejhang@majimak.com )
//
//  Log:
//    - 2013. 10. 24
//      Start writing class
//    - 2015. 11. 13
//      Adopted to the new version
// =================================================
 
#include "GETMath2.h"
 
#include <Rtypes.h>
 
#include <cmath>
 
ClassImp(GETMath2)
 
   GETMath2::GETMath2()
{
   Reset();
}
 
void GETMath2::Add(Double_t value)
{
   fMean += (value - fMean) / (Double_t)(fNumValues + 1);
 
   if (fNumValues > 0)
      fRms = fNumValues * fRms / (Double_t)(fNumValues + 1) + pow(value - fMean, 2) / (Double_t)(fNumValues);
 
   fNumValues++;
}
 
Double_t GETMath2::GetMean()
{
   return fMean;
}
Double_t GETMath2::GetRMS()
{
   return sqrt(fRms);
}
Double_t GETMath2::GetRMS2()
{
   return fRms;
}
 
void GETMath2::Set(Int_t numValues, Double_t mean, Double_t rms2)
{
   fNumValues = numValues;
   fMean = mean;
   fRms = rms2;
}
 
void GETMath2::Reset()
{
   fNumValues = 0;
   fMean = 0;
   fRms = 0;
}