[ROOT] Re: pointer to StatsBox's parameters

From: Rene Brun (Rene.Brun@cern.ch)
Date: Mon Feb 25 2002 - 12:46:47 MET


Hi Hermine,

To retrieve the number of entries, under/overflow from an histogram,
do not use the statistics box, but directly the functions from TH1:
If you have a TH1* h  (1-D, 2-D, 3-D, profiles, etc), do:

  h->GetEntries();
  h->GetBinContent(0);       //to get the underflows
  h->GetBinContent(nbins+1); //to get the overflows

Rene Brun


  Hermine Woehri wrote:
 > 
> Hello,
> 
> I would like to retrieve the following information from the statistics
> box.  I would like to get a pointer to the variables "number of entries",
> "overflow" and "underflow", which I would then further process and
> display. Is there a simple way to do that?
> 
> +------------------------------------------------------+
> |Hermine Katharina Woehri       hermine.woehri@cern.ch |
> +------------------------------------------------------|
> |EP Division                   office:  +41 22 767 9408|
> |CERN                          mobile:  +41 79 201 0715|
> |CH-1211 Geneve 23             fax:     +41 22 767 9780|
> |Switzerland                   private: +33 450 42 4415|
> +------------------------------------------------------+



This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:43 MET