Re: [ROOT] Fitting, errors and the HIST option

From: Bertalan Juhasz (Bertalan.Juhasz@cern.ch)
Date: Wed Sep 06 2000 - 15:17:19 MEST


On Wed, 6 Sep 2000, Rene Brun wrote:

> Hi Bertalan,
> use option "e1h"

Thank you, it is better, but is there any way to get rid of the error bars
completely?

Bertalan


> 
> Rene Brun
> 
> Bertalan Juhasz wrote:
> > 
> > Hello Rooters,
> > 
> > I have a 1D histogram with errors of each bin set via TH1::SetBinError().
> > If I fit this histo, it is drawn with error bars only and without the
> > histo contours. If I use the "HIST" option to force ROOT to draw the
> > contours, the fitted function is not drawn. Of course, I can draw the
> > fitted function later to the same pad via TF1::Draw("SAME") but in this
> > case I cannot modify the "x" axis range afterwards either using the
> > pop-up menu -> SetRange (nothing happens if I do so) or dragging the range
> > with the mouse (in this case only the drawing range of the fitted function
> > is modified but not that of the histogram). Any suggestions on how to
> > 
> > 1) draw a histo with contours & the fitted function if the bin errors have
> >    been set via SetBinError()
> > 
> > AND
> > 
> > 2) modify the axis ranges afterwards WITHOUT a macro/prompt line command
> >    i.e. dragging the axis ranges by mouse.
> > 
> > Thanks a lot,
> > 
> > Bertalan
> 



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