drawing ntuples

From: Selim Issever (selim.issever@desy.de)
Date: Mon Nov 08 1999 - 11:15:55 MET 

Hi all,

I have a little problem with drawing ntuples/trees. In my case I plot a rate
versus time (rate:time) and dont want to have markers, but lines drawn in
between. So i use the proposed approach:

  aNT->SetEstimate(aNT->GetEntries());
  aNT->Draw("rate:time", "", "goff,same"); 
  Int_t    selR = aNT->GetSelectedRows();
  Float_t *xArr = aNT->GetV2();
  Float_t *yArr = aNT->GetV1();

  TGraph *g  = new TGraph(selR, xArr, yArr);
  g->Draw("l");


this works fine, except when I have entires outside the histogram region
(which I assume to be from 3 to 7 in the example below):

the '.'s represent the real data, which are not drawn. the rest is, what I get
as a plot.

9        ........
8       .
7      /\
6     /    \
5    /        \
4   /            \------
3 -/
2
1                       
                 ^-- here is a sudden drop of the rate

what I'd like to have is something like this:

9        ........
8       .
7      /         |
6     /          |
5    /           |
4   /            |------
3 -/
2
1                       

the first plot somehow mock data,... If you are not an expert and know what
kind of data you are expecting, this could quite foul you,.. Is there a way to
make the plots the way I'd like to have them? resizing the plotting area isnt
a solution (esp when using log plots and having the trouble at the lower end).

Thanks a lot for your help and time in advance!
Best Wishes,
Selim

-- 
Selim Issever | Tel: 040 8998-2843    +- "Da packst Du ja schon wieder
DESY-F15      | Fax: 040 8998-4033    +- Information rein." Diplomand
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22603 Hamburg/Germany   |  http://www.physik.uni-dortmund.de/~issevers

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