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StRoot
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Public Member Functions | |
| StNegativeBinomial (const Double_t npp=2.38, const Double_t k=2.00, const Double_t x=0.13, const Double_t efficiency=1.0, const Double_t triggerbias=1.0, const Bool_t isConstEfficiency=kTRUE) | |
| Default constructor. More... | |
| virtual | ~StNegativeBinomial () |
| Default destructor. | |
| Double_t | GetTwoComponentMultiplicity (const Double_t npart, const Double_t ncoll) const |
| (1-x)*npart/2 + x*ncoll More... | |
| Int_t | GetMultiplicity (const Double_t npart, const Double_t ncoll) const |
| Get multiplcity by convoluting NBD. More... | |
| TH1 * | GetMultiplicity (const Double_t npart, const Double_t ncoll, const Double_t weight) const |
| Get multiplicity by scaled NBD, with npp*mult and k*mult. | |
| Double_t | GetNegativeBinomial (const Int_t n) const |
| Double_t | GetNegativeBinomial (const Int_t n, const Double_t m) const |
| Get NBD(npp, k; n) | |
| void | SetParameters (const Double_t npp, const Double_t k, const Double_t x=-1.0) |
| Get NBD(npp*m, k*m; n) More... | |
| Double_t | GetNpp () const |
| Double_t | GetK () const |
| Get npp parameter. | |
| Double_t | GetX () const |
| Get k parameter. | |
| Double_t | GetEfficiency () const |
| Get x parameter. | |
| Bool_t | IsConstEfficiency () const |
| Get mEfficiency (CAUTION: value has different meaning between constant and multiplicity dep. modes) | |
| void | DrawNbd () const |
| Get flag for efficiency. | |
Definition at line 17 of file StNegativeBinomial.h.
| StNegativeBinomial::StNegativeBinomial | ( | const Double_t | npp = 2.38, |
| const Double_t | k = 2.00, |
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| const Double_t | x = 0.13, |
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| const Double_t | efficiency = 1.0, |
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| const Double_t | triggerbias = 1.0, |
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| const Bool_t | isConstEfficiency = kTRUE |
||
| ) |
| Int_t StNegativeBinomial::GetMultiplicity | ( | const Double_t | npart, |
| const Double_t | ncoll | ||
| ) | const |
Get multiplcity by convoluting NBD.
Get multiplicity from negative binomial distribution
Definition at line 92 of file StNegativeBinomial.cxx.
References GetEfficiency(), GetTwoComponentMultiplicity(), StGlauberUtilities::GetUniform(), and StGlauberUtilities::GetUniform2().
Referenced by StNbdFitMaker::Fit(), and StFastGlauberMcMaker::Make().
| Double_t StNegativeBinomial::GetTwoComponentMultiplicity | ( | const Double_t | npart, |
| const Double_t | ncoll | ||
| ) | const |
(1-x)*npart/2 + x*ncoll
Remind 0.5. Need 2*npart in d+Au FTPC
Definition at line 84 of file StNegativeBinomial.cxx.
Referenced by GetMultiplicity(), and StFastGlauberMcMaker::Make().
| void StNegativeBinomial::SetParameters | ( | const Double_t | npp, |
| const Double_t | k, | ||
| const Double_t | x = -1.0 |
||
| ) |
Get NBD(npp*m, k*m; n)
Set (npp, k, x)
Initialize histogram
Definition at line 70 of file StNegativeBinomial.cxx.
1.8.5