again profiles

Wolfgang Korsch (wkorsch@server1.pa.uky.edu)
Mon, 7 Apr 1997 20:22:05 -0600

Hi,
I did ask this question a few times, but I don't seem to get
profile-plots to work properly.
My question is:

How can I generate a profile plot where I determine the binning
and range and not ROOT?

I use the following commands: (the x-range of the histogram is
from -200 to 200 and I would like to have a profile plot from
-100 to 100)

root [1] h1p = new TProfile("h1p","test",100,-100,100,0,1);
root [2] ntuple->Draw("pol:npos>>h1p","","prof");
Warning in <TNtuple::Draw>: Deleting old histogram with different dimensions

THIS WARNING TELLS ME THAT MY DEFINITION OF "h1p" IS OVERWRITTEN !!!

The displayed plot ranges from -200 to 200 in x.

and the command

root [3] h1p->Draw();

shows also a range from -200 to 200.

I am sure I do something wrong, but I'd like to know what?
Can somebody help me?

Wolfgang