Hi rooters,
i discovered that this procedure does not work:
TFile* file = new TFile("strip4_z2.root");
TNtuple* ntuple=(TNtuple*)file->Get("h8;1");
Float_t zmincut =100.;
ntuple->Draw("Iadc1","Xpos>zmincut");
ROOT talks: Error 26, Unknow name "zmincut".
It works only in this other fashion:
TFile* file = new TFile("strip4_z2.root");
TNtuple* ntuple=(TNtuple*)file->Get("h8;1");
ntuple->Draw("Iadc1","Xpos>100.");
How can i introduce a cut where i want?
And an other problem...
When the command Draw (ntuple-Draw("Xpos"); or histogram->Draw();)is
inside a macro, the histogram is plotted only when the macro is closed.
And When the command Draw is inside a macro called by an other main macro,
the histogram is plotted only when the main macro is closed. But how can i
interact with the histogram (to draw a line where i want, for example), if
i do not see him?
Thank you
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