- Int_t GetDimension(); // Provide dimension of the sample
- Int_t GetN(); // Provide the number of entries
- Float_t GetSum(Int_t i); // Provide sum for i-th variable
- Float_t GetMean(Int_t i); // Provide mean for i-th variable
- Float_t GetVar(Int_t i); // Provide variance for i-th variable
- Float_t GetSigma(Int_t i); // Standard deviation for i-th variable
- Float_t GetCov(Int_t i, Int_t j); // Covariance for i-th and j-th variable
- Float_t GetCor(Int_t i, Int_t j); // Correlation for i-th and j-th variable
- void Data(); // Stat. info for the complete sample
- void Data(Int_t i); // Stat. info for the i-th variable
- void Data(Int_t i, Int_t j); // Stat. info for i-th and j-th variable
+ Int_t GetDimension() const; // Provide dimension of the sample
+ Int_t GetN() const; // Provide the number of entries
+ Float_t GetSum(Int_t i) const; // Provide sum for i-th variable
+ Float_t GetMean(Int_t i) const; // Provide mean for i-th variable
+ Float_t GetVar(Int_t i) const; // Provide variance for i-th variable
+ Float_t GetSigma(Int_t i) const; // Standard deviation for i-th variable
+ Float_t GetCov(Int_t i, Int_t j) const; // Covariance for i-th and j-th variable
+ Float_t GetCor(Int_t i, Int_t j) const; // Correlation for i-th and j-th variable
+ void Data() const; // Stat. info for the complete sample
+ void Data(Int_t i) const; // Stat. info for the i-th variable
+ void Data(Int_t i, Int_t j) const; // Stat. info for i-th and j-th variable