[ROOT] Re: What happens to statistics in Add, Multiply

From: Alexander Cherlin (cherlin@wicc.weizmann.ac.il)
Date: Tue Jan 30 2001 - 19:03:09 MET


	Dear Rene!

> Hi Alexander,
> 
> With Add, statistics are computed using the statistical quantities
> in both histograms. In this case, the resulting stats preserve the
> original full accuracy.

	What does it mean "using the statistical quantities
in both histograms"? Is that a weighted mean value? What happens if I
change the content of a bin/bins using SetContent? What is the bin error 
in that case if I don't set a new one?

Thank you,
Alexander.



> In case of a multiplication/division, statistics are recomputed from
> the bin contents.
> 
> Rene Brun
> 
> 
> Alexander Cherlin wrote:
> > 
> >         Dear rooters!
> > If I create a new histogram using Add (or Multiply), what show Mean and
> > RMS values in statistics of the new histogram?
> > 
> > Thanks in advance,
> > Alexander.

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