Coordinate system for 2D histograms

From: Michael Roedelbronn <>
Date: Mon, 12 Jun 2006 17:56:17 -0400 (EDT)


   I am trying to plot some lines over the top of a "CONT4" 2D histogram. I wish to use the user coordinate system (the coordinates of the histogram itself), but ROOT seems to keep defaulting to the NDC. I thought the User coordinate system was the default. I tried resetting the Range using gPad->Range(...) but it made no difference. How can I assign coordinates to lines in the coordinate system of the histogram itself?

                                   Mike R
Received on Mon Jun 12 2006 - 23:56:26 MEST

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