include/root/RooRatio.h

0001 /*
0002  * Project: RooFit
0003  * Author:
0004  *   Rahul Balasubramanian, Nikhef 01 Apr 2021
0005  *
0006  * Copyright (c) 2023, CERN
0007  *
0008  * Redistribution and use in source and binary forms,
0009  * with or without modification, are permitted according to the terms
0010  * listed in LICENSE (http://roofit.sourceforge.net/license.txt)
0011  */
0012
0013 #ifndef RooFit_RooRatio_h
0014 #define RooFit_RooRatio_h
0015
0016 #include <RooAbsReal.h>
0017 #include <RooRealProxy.h>
0018
0019 class RooArgList;
0020
0021 class RooRatio : public RooAbsReal {
0022 public:
0023    RooRatio();
0024    RooRatio(const char *name, const char *title, double numerator, double denominator);
0025    RooRatio(const char *name, const char *title, double numerator, RooAbsReal &denominator);
0026    RooRatio(const char *name, const char *title, RooAbsReal &numerator, double denominator);
0027    RooRatio(const char *name, const char *title, RooAbsReal &numerator, RooAbsReal &denominator);
0028    RooRatio(const char *name, const char *title, const RooArgList &num, const RooArgList &denom);
0029
0030    RooRatio(const RooRatio &other, const char *name = nullptr);
0031    TObject *clone(const char *newname) const override { return new RooRatio(*this, newname); }
0032    ~RooRatio() override;
0033
0034    RooAbsReal const &numerator() const { return *_numerator; }
0035    RooAbsReal const &denominator() const { return *_denominator; }
0036
0037 protected:
0038    double evaluate() const override;
0039    void doEval(RooFit::EvalContext &) const override;
0040    inline bool canComputeBatchWithCuda() const override { return true; }
0041
0042    RooRealProxy _numerator;
0043    RooRealProxy _denominator;
0044
0045    ClassDefOverride(RooRatio, 2) // Ratio of two RooAbsReal and/or numbers
0046 };
0047
0048 #endif