Hi, To get the y value corresponding to bin k, h->GetBinContent(k); To get the bin number k corresponding to an x value, do int k = h->GetXaxis()->FindBin(x); Rene Brun On Tue, 3 Dec 2002, Manus wrote: > Hello, I need to get data points, or "y values", from a histogram I have. > For example, if I know the horizontal, or x, value of a histogram, what > command do I use to get the y value out? More specifically, say that my > histogram corresponds exactly to the function y = x^2, then if I wanted to > know the function value at, say x = 4, then the program would give me 16. > I have tried > > h1->GetBinContents(x); > > but this hasn't seemed to work. It seems like it should be easy enough to > do - but I haven't found the right command yet. Any help would be greatly > appreciated. Thank you. > > mjd > > >
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