[ROOT] problem with contours and TF2 in Vers 3.05.02

From: Aaron Roodman (roodman@SLAC.stanford.edu)
Date: Fri Feb 21 2003 - 03:03:01 MET 

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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