Re: [ROOT] problem with contours and TF2 in Vers 3.05.02

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri Feb 21 2003 - 16:17:34 MET


Hi Aaron,

This inconsistency has been fixed today by Olivier Couet in CVS.

Thanks for reporting this problem.

Rene Brun

Aaron Roodman wrote:
> 
> Rooters,
> 
>   I am using a TF2 to make contours with unequal divisions, and find a problem
> with version 3.05.02 (on Linux redhat 7.2)
> 
> Using the following:
> 
>   TF2 *gaus = new TF2("gaus","exp(-0.5*(x*x+y*y)/10.0)",-10.,10.,-10.,10.);
>   gaus->SetMaximum(1.0);
>   gaus->SetMinimum(0.2);
>   gaus->SetNpx(100);
>   gaus->SetNpy(100);
> 
>   Double_t contlevels[4] = {0.2,0.7,0.75,0.95};
>   gaus->SetContour(4,contlevels);
>   Int_t morecolors[4] = {5,4,3,2};
>   gStyle->SetPalette(4,morecolors);
> 
>   TCanvas *cone = new TCanvas("cone","colors",100,100,400,400);
>   gaus->Draw("zcol");
> 
>   TCanvas *ctwo = new TCanvas("ctwo","contours",500,100,400,400);
>   gaus->Draw("cont1");
> 
> I find in Version 3.05.02 I get the desired unequal divisions in the "zcol"
> plots, but not in the "cont1" version. Instead, in the "cont1" version the
> contours come out with equal divisions.
> 
> I tried the above with version 3.03.09, and oddly enough found the opposite
> behavior, where the "cont1" plot worked, but the "zcol" plot came out
> with equal divisions.
> 
> Thanks for your help.
> 
>      Aaron
> 
> _______________________________________________________________________________
> 
>  Prof. Aaron Roodman           Stanford Linear Accelerator Center
> 
>  Stanford University           E-mail: roodman@slac.stanford.edu
>  2575 Sand Hill Rd.            Phone:  650-926-2705
>  MS 95                         Fax:    650-926-2657
>  Menlo Park, CA 94025          URL:    http://www.slac.stanford.edu/~roodman
> _______________________________________________________________________________
> 
> 
>



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