Dear roottalkers !
I need to output an ascii file from a histogram.
I've written this little macro m60co2a4_geap.C :
{
gROOT->Reset();
TFile f("m60co2a4_geap.root"); /* root file obtained
by h2root from hbook*/
FILE *f1;
int i, nc = 4096; /*
known numbers and limits of channels */
float hsup = 3000;
f1 = fopen ("m60co2a4_geap.tsv", "w"); /* tab separated values */
if (!f1) puts ("? output file");
else {
for (i=1; i<=nc; i++) fprintf (f1, "%f\t%f\n", (i-.5)*hsup/nc,
h21->GetBinContent(i));
fclose (f1);
}
}
h21 is the 4096 channels histogram to output, I supposed that the
channels 0 and 4097 are for under and overflows (isn't it ?).
The first time I run this macro I get
fprintf parameter mismatch param[0] E C
FILE:/home/jpl/geant/geap/current/result/spectra/m60co2a4_geap_calc.C
LINE:13
The second time
4096 times :
Error: fprintf parameter mismatch param[0] E C
FILE:/home/jpl/geant/geap/current/result/spectra/m60co2a4_geap_calc.C
LINE:13
And the third, the expected file, but after a long time.
Is it a simpler way to do this ? (I use Linux 2.0.33 on a pentium 100)
Best Regards
--
-
Jean-Pascal Laedermann
mathematicien, ing. physicien EPFL
Institut de Radiophysique Appliquee
Cité Universitaire
CH-1015 Lausanne
Switzerland
phone: +41 21 693 3665
email: jean-pascal.laedermann@inst.hospvd.ch
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