just a little question: I fitted a plot with pol1. When I get the parameters with passing the option "Q" the parameters are integers. If I drop "Q" they are floats as they should be. So is it a bug of root or do I have a closer look to my code? the printf, I use is always the same! This is the line I exchange: h_ApvGain[i][k]->Fit("pol2","Q"); where : h_ApvGain[i][j] = new TH1F(name, title, 200, 0, 200); Thank you very much Davide Gerbaudo.
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