Hallo Mario,
This will work :
> TFile fin("run1411_1.root");
TH1F *h2 = new TH1F("h2","h2",100,0,500);
> h1->Draw("adc0>>h2");
TFile fout("hv.root","RECREATE");
> h1->Write();
> fout.Close();
>
Maybe the problem is that root is scanning the current directory to decide
if Tree::Draw will create the histogram. In your case it was looking in
fin.
see you,
Colin
> ==> Output contains empty histo h2, because Draw creates a new one in
> fin.
>
> How can I solve the problem?!
>
> cheers
>
> Mario
>
>
>
> -- ------------------------------------------------------- --
> * Mario Leberig *
> * AG Kabuss CERN *
> * Universitaet Mainz EP Division *
> * Institut fuer Kernphysik Bat. 892-RA13 *
> * D-55099 Mainz 1211 Geneva 23 *
> * Tel. +49-6131/39-22932 Tel. +41-22-767-6461 *
> * Fax +49-6131/39-22964 Fax +41-22-767-7910 *
> -- ------------------------------------------------------- --
>
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