user defined function problem,

From: Hongquan Niu (niu@cdfsga.fnal.gov)
Date: Wed Jun 16 1999 - 03:17:59 MEST 

Hi, rooters,

I want to draw a user defined function in two pads with
different parameter(not UserFunc parameter now if there is
any difference). I use 
   TF1 *func = new TF1("fit", UserFunc, -0.08, 0.44,0);
   func->DrawCopy();
First there is some complain but it can be drew.
Then I change some number and goto another pad and draw
it again. Then the plot in the first pad also changed.
I wonder how I can avoid this?

Thanks,
Hongquan

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