Hello rooters,
I use root version 2.23/12 on DEC/ALPHA. I have this example for see you my
problem of the last week.
My little macro is very simple:
{
Int_t nbr_bin_simu = 11;
TH1F *target = new TH1F("target","test",nbr_bin_simu+1,0,nbr_bin_simu);
FILE *pfic = fopen("ascii_2.dat","r");
Int_t ncols,i=0;
Float_t x,y;
while (1)
{
ncols = fscanf(pfic,"%f %f",&x, &y);
if ((ncols < 0) || (i == nbr_bin_simu)) break;
cout<<x<<" "<<y<<endl;
target->Fill(x,y);
i++;
}
fclose(pfic);
TCanvas *c1 = new TCanvas("c1","test",30,30,600,600);
TLegend *leg = new TLegend(0.6,0.7,0.98,0.96);
leg->AddEntry(target,"tantale","l");
c1->cd();
//c1->SetLogy();
target->Draw();
leg->Draw();
}
This macro call this ascii file:
0.0 1.00e-3
1.0 1.01e-3
2.0 1.02e-3
3.0 1.03e-3
4.0 1.04e-3
5.0 1.05e-3
6.0 1.06e-3
7.0 1.07e-3
8.0 1.08e-3
9.0 1.09e-3
10.0 1.10e-3
When i execute the macro on my DEC is:
*** Break *** floating point exception
But i use the selection c1->SetLogy(), there is no problem, the plot is ok.
When i replace in the ascii file e-3 by e-2 or more bigger, i can see my plot
with the legend.
If i put in comment the line: leg->Draw(); there is no problem whatever the
value selected
If i use this macro with Linux on a PC, there is no matter at all.
Thanks for your help.
Luc Perrot
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Luc Perrot E-mail:perrot@isn.in2p3.fr
ISN 53 avenue des Martyrs 38026 GRENOBLE cedex
Tel: 76-28-40-00 poste 43-14
Fax: 76-28-40-04
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