TMultiGraph problem

ROOT
#1

I am having problem with TMultiGraph - automatic scaling of Y axis doesn’t work if I include TGraphErrors with “big” error bars.

Please see the attached script “TestMultiGraph.C” and run it and you will realize that 3 Graphs (TGraphErrors) are displayed normally when drawn separately by multigraph (last one) is missing low lying points.

Is there anything wrong with TMultiGraph or am I doing anything wrong?

thanks
michal
TestMultiGraph.C (1.66 KB)

#2

What you do is correct.
The problem appears in a TMultiGraph when one of the TGraphErrors has a Y value
smaller than its error.
I have optimized this case in the CVS version.

Rene