Hi, Could you, please, tell me how can I Draw part of a histogram ( NOT FIT, JUST DRAW ). I would like to do this from a root c-source code line ( something like EventLength.Zoom(10.,20.) which should draw the part of the EventLength histogram in x-axis-subrange from 10. to 20. ), and graphically - assume I have drawn the whole histogram using EventLength.Draw(), and then I would like to see a part of it, so I would like to "klick" at the left-edge-of-required-zoom, then "klick" at the right-edge-of-required-zoom and ... that should be all. Some time ago I was adviced to use : if (hist=(TH1F*)gDirectory->GetList()->FindObject("EventLength")) { ... } as a replacement for if ( hexist(9999) ) ... Now I tried to use it ... having some 100 histograms in directory ... . Seems that the root FindObject is order(s) of magnitude slower then paw's hexist ( used with the same amount of histograms ). Jacek.
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