Re: Error band

Rene Brun (Rene.Brun@cern.ch)
Wed, 21 Jan 1998 18:21:06 +0100


Wolfgang Korsch wrote:

> Hi Rene,
> is there an easy way to generate an error band around my data points?
> I have a 2d plot ( (y+/-dy) vs x) and I would like to generate
> a band around my data points, instead of error bars. I also would
> like to 'paint' (fill) the band with a certain color.
> Is there some example somewhere?
>
> Thanks.
>
> Wolfgang

This is possible if your data points have been entered in histograms
bins.
For example, if you have a TH1F *h object, you can
h->Draw("e3");
h->Draw("e4");
You can fill the band with
h->SetFillColor(kRed); // or any other color
h->Draw("e3");

This facility is not implemented (it should) in TGraph and TGraphErrors.

Rene Brun