12#ifndef ROOT_TStatistic
13#define ROOT_TStatistic
#define ClassDef(name, id)
Collection abstract base class.
Mother of all ROOT objects.
Statistical variable, defined by its mean and variance (RMS).
void ls(Option_t *opt="") const
The ls function lists the contents of a class on stdout.
~TStatistic()
TStatistic destructor.
Double_t GetMeanErr() const
TStatistic(const char *name="")
const char * GetName() const
Returns name of object.
void Fill(Double_t val, Double_t w=1.)
ULong_t Hash() const
Return hash value for this object.
void Print(Option_t *="") const
This method must be overridden when a class wants to print itself.
Int_t Merge(TCollection *in)
UInt_t Hash(ECaseCompare cmp=kExact) const
Return hash value.
Double_t Sqrt(Double_t x)