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.
>
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