Hi, Rene,
Thank you very much! It works this way. But I have another question:
Where to put the cut condition like abs(x)<0.2? I tried this:
tree.Draw("y:x","prob","surf1","abs(x)<0.2");
tree.Draw("y:x","prob","abs(x)<0.2","surf1");
Both do not work.
Thank you very much!
Kai Yi
On Sat, 27 Jan 2001, Rene Brun wrote:
> Hi Kai,
> I am not sure to understand your question.
> Do you want to create a 2-d histogram of x versus y
> filling eacg cell with the Prob values ? If yes, do
> tree.Draw("y:x","prob","surf1");
>
> Rene Brun
>
> On Fri, 26 Jan 2001, Kai Yi wrote:
>
> > Hi, Everyone,
> > I have a specific question to ask, anyone can help me?
> > Suppose I have a ntuple(tree), it has the following leaves:
> > nEvent //trigger number
> > x //x coordinate
> > y //y coordinate
> > z //z coordinate
> > prob //some Prob. based on x,y,z
> >
> > I want to draw a surface picure like this: x->y->Prob
> > here I need to specify the trigger no.--nEvent, about z direction, it is a
> > integrate.
> > I tried this from treeViewer, it draw me a 3D picture, it is point based
> > picture, I want a surface picture(more smoothly). I tried to put "Surf"
> > into Gopt box, it does not work.
> > Anyone can help me?
> > Thanks a lot
> >
> >
> > Kai YI
> >
> >
> >
> >
>
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