Re: TH1::GetNormFactor() what's for?

Thanks for helping!

On Feb 4, 2008 11:45 AM, Rene Brun <Rene.Brun_at_cern.ch> wrote:

> TH1::GetNormFactor returns what was set via TH1::SetNormFactor(double
> factor).
> This normalization factor is stored as a TH1 data member. When set, this
> factor is used to scale
> automatically the picture at drawing time without modifying the
> histogram contents.
> On the other hand, when calling TH1::Scale, the bin contents are
> modified accordingly and there is
> no way to remember what was the argument to TH1::Scale
>
> Rene Brun
>
> Antonio Bulgheroni wrote:
> > Dear ROOTers,
> >
> > In these days I'm playing with normalized histograms and I was
> > surprised by the behavior of GetNormFactor. The documentation is not
> > very useful (sigh!) and I don't understand what is for. I though it
> > was returning the value used to scale the bin contents, but I can't
> > get any numbers different from 0.
> >
> > Attached an example.
> >
> > Thanks for the clarification!
> >
> > Antonio
> >
> > --
> > Antonio Bulgheroni, PhD
> >
> > Computers have a lot in common with air conditioners:
> > Once you open WINDOWS, they stop working properly.
>
>

-- 
Antonio Bulgheroni, PhD

Computers have a lot in common with air conditioners:
Once you open WINDOWS, they stop working properly.