#include <math.h>
#include "TObject.h"
+#include "TF1.h"
+#include "TString.h"
+#include "TMath.h"
class AliMath : public TObject
{
Double_t Prob(Double_t chi2,Int_t ndf,Int_t mode=1) const; // Compute Chi-squared probability
Double_t BesselI(Int_t n,Double_t x) const; // Compute integer order mod. Bessel function I_n(x)
Double_t BesselK(Int_t n,Double_t x) const; // Compute integer order mod. Bessel function K_n(x)
-
+ TF1 Chi2Dist(Int_t ndf) const; // Provide the Chi-squared distribution function
+ TF1 StudentDist(Double_t ndf) const; // Provide the Student's T distribution function
+ TF1 FratioDist(Int_t ndf1,Int_t ndf2) const; // Provide the Fratio distribution function
+ TF1 BinomialDist(Int_t n,Double_t p) const; // Provide the Binomial distribution function
+ TF1 NegBinomialDist(Int_t k,Double_t p) const; // Provide the Negative Binomial distribution function
+ TF1 PoissonDist(Double_t mu) const; // Provide the Poisson distribution function
+ Double_t Chi2Pvalue(Double_t chi2,Int_t ndf,Int_t sides=0,Int_t sigma=0,Int_t mode=1) const; // Chi-squared P-value
+ Double_t StudentPvalue(Double_t t,Double_t ndf,Int_t sides=0,Int_t sigma=0) const; // Student's P-value
+ Double_t FratioPvalue(Double_t f,Int_t ndf1,Int_t ndf2,Int_t sides=0,Int_t sigma=0) const; // F ratio P-value
+ Double_t BinomialPvalue(Int_t k,Int_t n,Double_t p,Int_t sides=0,Int_t sigma=0,Int_t mode=0) const; // Bin. P-value
+ Double_t PoissonPvalue(Int_t k,Double_t mu,Int_t sides=0,Int_t sigma=0) const; // Poisson P-value
+ Double_t NegBinomialPvalue(Int_t n,Int_t k,Double_t p,Int_t sides=0,Int_t sigma=0,Int_t mode=0) const; // NegBin. P-value
+ Double_t Nfac(Int_t n,Int_t mode=0) const; // Compute n!
+ Double_t LnNfac(Int_t n,Int_t mode=2) const; // Compute ln(n!)
+ Double_t LogNfac(Int_t n,Int_t mode=2) const; // Compute log_10(n!)
+
protected:
Double_t GamSer(Double_t a,Double_t x) const; // Compute P(a,x) via serial representation
Double_t GamCf(Double_t a,Double_t x) const; // Compute P(a,x) via continued fractions
Double_t BesselI1(Double_t x) const; // Compute modified Bessel function I_1(x)
Double_t BesselK1(Double_t x) const; // Compute modified Bessel function K_1(x)
- ClassDef(AliMath,3) // Various mathematical tools for physics analysis.
+ ClassDef(AliMath,5) // Various mathematical tools for physics analysis.
};
#endif