Re: TH1::SetBins

From: Rene Brun (Rene.Brun@cern.ch)
Date: Wed May 28 1997 - 09:41:18 MEST

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OLSZEWSKI@vsk02.ifj.edu.pl wrote:
> 
>  Hi,
> 
>   when I SetBins(nx,lx,hx) on an existing histogram new boundaries (lx,hx)
> are not used to cut off contents outside of them as I would expect but
> rather the whole contents of the histogram is reallocated into new bins.
> 

yes, when calling TH1::SetBins the whole histogram contents must
be reallocated. You change the number of bins, bin size, everything.
In Root, this function is called by TTree::Draw.

Rene Brun

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