Re: ProjectionX

From: Rene Brun <Rene.Brun_at_cern.ch>
Date: Fri, 23 Sep 2011 14:59:10 +0200


if you have called TH2::Sumw2 on your TH2 histogram, then the projection is also created with the correct computation of the errors and the errors are displayed by default.

Rene

On 23/09/2011 14:33, Georg Troska wrote:
> Hi,
>
> I'm wondering why the TH1D* from TH2::ProjectionX is sometimes forced to be drawn in the error-bar option.
> I was not able to find out where this comes from. When I read in a histogram from a root-file the projection is sometimes error-bar only
>
> Any hint?
>
> Georg
>
Received on Fri Sep 23 2011 - 14:59:30 CEST

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