Re: [ROOT] Redimensioning

From: Alberto Garcia Raboso (Alberto.Garcia.Raboso@cern.ch)
Date: Fri Aug 02 2002 - 14:59:42 MEST


Hi Rene,

You're right, my function has asymptotes and I'm sure that this is the
reason for this behaviour. But I cannot change the function, so I need a
way to redimension the range in the y axis.

About the ".root" file, the after.gif is generated from it, and the
before.gif is generated during the running of the program.

Cheers,

Alberto

Rene Brun wrote:
> 
> Hi Alberto,
> 
> Very likely, your function has some peculiar parameter values
> that generate infinite values on the y scale. When saving the function
> to a file, precomputed function values are saved at TH1::fNpx points.
> An interpolation is done when reading the canvas with the function.
> A  canvas.root file would be more useful than gif files.
> 
> Rene Brun
> 
> On Thu, 1 Aug 2002, Alberto Garcia Raboso wrote:
> 
> > Hi ROOTers,
> >
> > I have some profiles, already drawn, that I have to fit (so I do it).
> > Everything's OK up to this point, but, when I try to draw the fit
> > function, everything's KO. Although I use the "same" option, it seems
> > that ROOT goes crazy, maybe because the fit function has asymptotes, and
> > thus changes the scale in the y axis.
> >
> > I think I've tried almost everything, but I can't get to redimension it
> > to the desired range from the command line. So, I've had to implement a
> > loop to modify the range in which the function is drawn to manually
> > specify it until it is OK. More or less, the problem is solved, but this
> > forces me to stand in front of the screen during the running (a not very
> > interesting activity).
> >
> > So, does anybody have an idea about how to arrange it so I could go to
> > have a coffee? Thanks in advance.
> >
> > Cheers,
> >
> > Alberto
> >
> > P.S.: By the way, when I save the canvas as a ".root" file and try to
> > open it later, I get a difference. Have a look on the files "before.gif"
> > and "after.gif" at /afs/cern.ch/user/g/graboso/public/. The fitting
> > range is [-300, 300].
> >



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