> tree->Draw("x");
> tree->Draw("y","","same");
>
> The y values will be off scale. I would like to be able to define
> a histogram
>
> TH1F myhist("myhist","myhist",-3,13,16);
>
> and then get the tree->Draw() command to fill myhist.
Did you try
tree->Draw("y>>myhist","","same");
>
> Can I do this without resorting to tree->MakeClass(); ?
>
> Cheers. Steve.
>
> On Nov 22, 5:21pm, Valeri Fine (Faine) wrote:
> > Subject: Re: [ROOT] nt/fill
> >
> >
> > > What's the root equivlent to the nt/fill command?
> >
> > There is the method:
> >
> > TTree::Fill()
> > see: http://root.cern.ch/root/htmldoc/TTree.html#TTree:Fill
> >
> > However I am not sure I did get your question.
> > What did you call "nt/fill" ?
> >
> > PAW says:
> >
> > PAW > nt/fill
> > *** Unknown command: nt/fill
> > PAW >
> >
> > > Or, if I do a
> > > tree->Draw("x:y>>myplot");
> > >
> > > Is there a way of defining the axis of myplot?
> > >
> >
> > "myplot" is your 2d histogram:
> > http://root.cern.ch/root/htmldoc/TH2.html
> >
> > The last os derived from
> > http://root.cern.ch/root/htmldoc/TH1.html
> > and inherits TH1 properties as well.
> >
> > The method
> >
> > http://root.cern.ch/root/htmldoc/TH1.html#TH1:SetMaximum
> >
> > can be used to define z-scale with 2d hisrogram .
> > x and y scales are defined by "myplot" TH2F class constructor.
> >
> >
> > > Cheers. Steve.
> > >
> > >
> >-- End of excerpt from Valeri Fine (Faine)
>
>
>
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