Hi Rene,
I would be happy with the first case but
I mean (norm for pixid==0 and pdid=0) against (norm for pixid=0 and
pdid=37)
So if I want to do let's say x versus y I do
h10->Draw("x:y"), easy but what about my case where I need x versus x with
2 different options... ? Is it possible ?
I guess I can't do that. Thus I would need to extract the data from the
ntuple to put it on a 2d histogram...
Cheers
On Thu, 11 Apr 2002, Rene Brun wrote:
> Hi Reinhardt,
>
> What do you mean by
> "plot norm for pdid=0 and pixid=1 against norm for pdid=0"
>
> Do you mean :Superimposing two histograms obtained with
> different selection criteria?
> A scatter-plot? of what versus what?
>
> Assuming you mean the first case, you can do:
> h10->Draw("norm","pdid==0 && pixid==1");
> h10->Draw("norm","pdid==0 && pixid==37","same");
>
> Rene Brun
>
> On Thu, 11 Apr 2002, Reinhardt Chamonal wrote:
>
> > Hi,
> > As I am still a starter at root I still have basic questions...
> > I am trying to plot one ntuple variable against the same one but with
> > different parameters..
> > So I have a variable called norm which depends on pdid and pixid.
> > For example I can plot norm for pdid=0 and pixid=0 using the following
> > way:
> > h10->Draw("norm","pdid==0 && pixid==1");
> > A second histogram could be:
> > h10->Draw("norm","pdid==0 && pixid==37");
> > Now I would like to basically plot the two histograms againt one
> > another..ie plot norm for pdid=0 and pixid=1 against norm for pdid=0 and
> > pixid=37.
> > I am ok doing so for the same parameters but different variables, but
> > here I have the same variable against different parameters. To do so can I do
> > something like ?
> > h10->Draw("norm:norm","pdid==0 && pixid==1","pdid==0 && pixid==1");
> > or is it better to read the data and fill a 2D histogram or a compare
> > directly the 2 histograms...
> > Otherwise how do I do ?
> >
> > Hope you understood my problem wasn't easy to explain...
> > Cheers.
> >
>
--
------------------------------------------------------------
Reinhardt CHAMONAL The University of Edinburgh
Dept. of Physics & Astronomy
email: chamonal@ph.ed.ac.uk King's Buildings, JCMB, 5301
Mayfield Road
phone: +44-131-650 5307 Edinburgh, EH9 3JZ
web: http://www.ph.ed.ac.uk/~chamonal/
http://www.reuh.fr.st
------------------------------------------------------------
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:49 MET