Hi Stephane,
Stephane Plaszczynski wrote:
>
> hello,
>
> In encounter rthe follwoing problems with error bars on TH1F:
>
> 1/I put some errors to one histo in my analysis.
> Now I can't get rid of them when plotting it!
> h1->Draw("P") still draws the error bars...Is there a way of drawing
> only the points values?
do: h1->Draw("hist p");
see:http://root.cern.ch/root/htmldoc/THistPainter.html#THistPainter:Paint
and look at "list of options"
>
> 2/I have a ntuple with "x y sigma_y". Is there a direct way to plot
> y vs x with sigma_y errors on y (other than MakeClass...)?
This is a profile histogram. do
tuple->Draw("y:x","',"profs");
see doc of TTree::Draw
>
> 3/I plot some histos on my canvas.
> I then want to add some points from a tuple.
> when I incoporate
> "tuple->Draw("y:x","",""same");
> to my script I don't see any oupput (even with a c1->Update)
>
> if I do it interactively it works...
> (I am using Root3.05)
I need to see your code, in particular your main program.
Do you create a TApplication? Please mimic the root main program.
Rene Brun
>
> thanks
>
> stephane
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