Hi, I had a look at http://root.cern.ch/root/html/examples/twoscales.C.html but this solution has a problem. I'm superimposing two histograms, but therefor I have to change the units of one of the histograms (Scale()). But I still want to use the histogram afterwards. The problem is, that my program looks like this: 0) Fill Data into histograms 1) Draw histogram1 2) Superimpose histogram2 3) Do something with the histogram... 4) goto 0) But this doen't easily allow changing the scale of the histogram. Another solution would be to draw a copy of the contents of the histogram, but this takes a lot of time which I don't have... Is ther e any other solution? Thomas.
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