Hi Philip, You can do: mytree->Draw("mean*(readoutType==1):mean*(readoutType==2)") Rene Brun On Wed, 14 May 2003, Philip Symes wrote: > Hi, > I'm dealing with data that has been sent to me as a ROOT tree in 2 channels, > so I can plot histograms using the cuts > mytree->Draw("mean","readoutType==1") > or > mytree->Draw("mean","readoutType==2"). > My problem is that I want to plot the mean of readoutType 1 against that of > readoutType 2. > That means that I need a different cut on the y-axis to that on the x-axis. > I've asked around, but no-one seems to know how to do it. Is it possible? > > Many thanks, > Phil > >
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