RE: matrix difference

From: Olivier Couet <>
Date: Fri, 10 Nov 2006 18:41:49 +0100


Now when an histogram has negative and positive entries, the minimum is set to be 0.0001*Maximum (Maximum being positive). If min and max are negative an error is issued... You can shift your data to make them > 0 and plot two histo with different colors.

-----Original Message-----
From: [] On Behalf Of Alexander Bürger Sent: Friday, November 10, 2006 6:18 PM
Subject: [ROOT] matrix difference

Dear ROOTers,

I woulk like to visualize the difference of two matrices in log scale. The problem I have doing this are the negartive entries, which are the some how mapped to zero. Is it possible to have a "logarithmic" scale where both positive and negative bin contents are shown using two different color codes for their absolute values?

Thanks for your help,

Alexander Received on Fri Nov 10 2006 - 18:41:57 MET

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