RooNumCdf.cxx

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  * Project: RooFit                                                           *
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/**
\file RooNumCdf.cxx
\class RooNumCdf
\ingroup Roofitcore
 
Implementation of RooNumRunningInt
that calculates cumulative distribution functions from p.d.f.s. The main
difference between RooNumCdf and RooNumRunningInt is that this class
imposes special end-point conditions on the interpolated histogram
that represents the output so that the value at the lower bound is
guaranteed to converge to exactly zero and that the value at the
upper bound is guaranteed to converge to exactly one, at all interpolation
orders.
**/
 
#include "Riostream.h"
 
#include "RooAbsPdf.h"
#include "RooNumCdf.h"
#include "RooAbsReal.h"
#include "RooMsgService.h"
#include "RooDataHist.h"
#include "RooHistPdf.h"
#include "RooRealVar.h"
 
 
////////////////////////////////////////////////////////////////////////////////
/// Construct a cumulative distribution function from given input p.d.f over observable x.
/// using a numeric sampling algorithm. Use binning named 'bname' to control sampling
/// granularity
 
RooNumCdf::RooNumCdf(const char *name, const char *title, RooAbsPdf& _pdf, RooRealVar& _x, const char* bname) :
   RooNumRunningInt(name,title,_pdf,_x,bname)
 {
 }
 
////////////////////////////////////////////////////////////////////////////////
/// Fill cache using running integral cache elements calculate()
/// method with specification of cdf-specific boundary conditions
 
void RooNumCdf::fillCacheObject(RooAbsCachedReal::FuncCacheElem& cache) const
{
  RICacheElem& riCache = static_cast<RICacheElem&>(cache) ;
  riCache.calculate(true) ;
}