RooLognormal.h

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/*****************************************************************************
 * Project: RooFit                                                           *
 * @(#)root/roofit:$Id$ *
 *                                                                           *
 * RooFit Lognormal PDF                                                      *
 *                                                                           *
 * Author: Gregory Schott and Stefan Schmitz                                 *
 *                                                                           *
 *****************************************************************************/
 
#ifndef ROO_LOGNORMAL
#define ROO_LOGNORMAL
 
#include <RooAbsPdf.h>
#include <RooRealProxy.h>
 
class RooLognormal : public RooAbsPdf {
public:
   RooLognormal() {}
   RooLognormal(const char *name, const char *title, RooAbsReal &_x, RooAbsReal &_m0, RooAbsReal &_k,
                bool useStandardParametrization = false);
   RooLognormal(const RooLognormal &other, const char *name = nullptr);
   TObject *clone(const char *newname) const override { return new RooLognormal(*this, newname); }
 
   Int_t getAnalyticalIntegral(RooArgSet &allVars, RooArgSet &analVars, const char *rangeName = nullptr) const override;
   double analyticalIntegral(Int_t code, const char *rangeName = nullptr) const override;
 
   Int_t getGenerator(const RooArgSet &directVars, RooArgSet &generateVars, bool staticInitOK = true) const override;
   void generateEvent(Int_t code) override;
 
   void translate(RooFit::Detail::CodeSquashContext &ctx) const override;
   std::string
   buildCallToAnalyticIntegral(int code, const char *rangeName, RooFit::Detail::CodeSquashContext &ctx) const override;
 
   /// Get the x variable.
   RooAbsReal const &getX() const { return x.arg(); }
 
   /// Get the median parameter.
   RooAbsReal const &getMedian() const { return m0.arg(); }
 
   /// Get the shape parameter.
   RooAbsReal const &getShapeK() const { return k.arg(); }
 
   bool useStandardParametrization() const { return _useStandardParametrization; }
 
protected:
   RooRealProxy x;  ///< the variable
   RooRealProxy m0; ///< the median, exp(mu)
   RooRealProxy k;  ///< the shape parameter, exp(sigma)
   bool _useStandardParametrization = false;
 
   double evaluate() const override;
   void computeBatch(double *output, size_t nEvents, RooFit::Detail::DataMap const &) const override;
   inline bool canComputeBatchWithCuda() const override { return true; }
 
private:
   ClassDefOverride(RooLognormal, 2) // log-normal PDF
};
 
#endif