Dear all, I found a strange behavior using tree Draw on a specific frame. When i plot a tree without a predefined frame and i change the Y axis scale from linear to log the range is fixed by root and several points of the plot are excluded. For this reason I have followed a suggestion to create a predefined frame to fix the logarithmic range for the Y axis. I am using the following example TCanvas *c7 = new TCanvas("c7","Lifetime",+0,+0,900,680); c7->SetLogy(); TH2F frame7("frame","Lifetime", 1, 0, 60, 1000, 1, 1000); frame7.Draw(); Now with the treeviewer I plot on the frame a first plot with tv_tree->Draw("br.var1:br.var2","several cuts","same"); At this point everything is OK. When I want to add another plot (with a similar command) on the same frame but with different cuts it creates a strange plot where the points are placed in a way different from what they look like when I plot them singularly. In other words the points are placed in a strange way and filling some region of the plot that are wrong (I know this since when I plot the second plot as first I found a regular behavior). Suggestions? Regards Luca
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