>   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