ITS/AliITSstatistics.h

   1 #ifndef ALIITSSTATISTICS_H
   2 #define ALIITSSTATISTICS_H
   3 //////////////////////////////////////////////////////////////////////////
   4 //  Alice ITS first detector alignment program.                         //
   5 //                                                                      //
   6 // version: 0.0.0 Draft.                                                //
   7 // Date: April 18 1999                                                  //
   8 // By: Bjorn S. Nilsen                                                  //
   9 //                                                                      //
  10 //////////////////////////////////////////////////////////////////////////
  11 #include "TObject.h"
  12
  13 class AliITSstatistics : public TObject {
  14 //
  15
  16  public:
  17   AliITSstatistics();
  18   AliITSstatistics(Int_t order);
  19   AliITSstatistics(AliITSstatistics &source); // copy  constructor
  20   AliITSstatistics& operator=(AliITSstatistics &source); // operator=
  21   virtual ~AliITSstatistics();
  22   void Reset();
  23   void AddValue(Double_t x,Double_t w);
  24   void AddValue(Double_t x){
  25                             // Default weight of 1
  26                             AddValue(x,1.0);
  27                                                                          }
  28   void AddValue(Float_t x,Float_t w){
  29                                      //float
  30                                      AddValue((Double_t)x,(Double_t)w);
  31                                                                                                  }
  32   void AddValue(Float_t x){
  33                            // floats default weight of 1
  34                            AddValue((Double_t)x,(Double_t)1.0);}
  35   Double_t GetNth(Int_t order);
  36   Double_t GetMean() {
  37                       // returns the mean
  38                       return GetNth(1);
  39                                                         };
  40   Int_t GetN(){
  41                // returns the number of entries
  42                return fN;
  43               };
  44   Int_t GetOrder(){
  45                    // returns the order of the moment of the distribution
  46                    return
  47                                                  fOrder;
  48                   };
  49   Double_t GetXN(Int_t order){
  50                               // returns X^N
  51                               return fx[order-1];
  52                               };
  53   Double_t GetWN(Int_t order){
  54                               // returns W^N
  55                               return fw[order-1];
  56                              };
  57   Double_t GetRMS();
  58   Double_t GetErrorMean();
  59   Double_t GetErrorRMS();
  60
  61  private:
  62   Double_t *fx;   // fx array of x moments
  63   Double_t *fw;   // fw array of weight by moment
  64   Int_t    fN;    // fN number of enetries
  65   Int_t    fOrder;// fOrder maximum allowed moment
  66
  67   ClassDef(AliITSstatistics,1)// A class to do simple statistics calculations
  68 };
  69 #endif