Hi Claire,
It is not clear what you want to shade exactly.
Here is an example from which you can get some inspiration.
Rene Brun
{
gROOT->Reset();
Int_t nbins = 100;
TH1F *h1 = new TH1F("h1","h1",nbins,-3,3);
h1->FillRandom("gaus",10000);
h1->Draw();
TH1F *h2 = (TH1F*)h1->Clone();
Double_t mean = h1->GetMean();
Double_t rms = h1->GetRMS();
for (Int_t i=1;i<=nbins;i++) {
Double_t x = h1->GetXaxis()->GetBinCenter(i);
if (x <mean-rms || x > mean+rms) h2->SetBinContent(i,0);
}
h2->SetFillColor(kRed);
h2->SetFillStyle(3013);
h2->Draw("same");
}
On Sat, 24 Feb 2001, Claire Gwenlan wrote:
>
> Hi everybody,
>
> Just wondering how to create a nice shaded band on a TGraph, for example a
> band stretching from -1 to +1 to represent 1 standard deviation on a
> graph.
>
> Cheers,
>
> Claire
>
> __________________________________
> Claire Gwenlan
> Department of Physics & Astronomy
> University College London
> Gower Street
> LONDON
> WC1E 6BT
>
> Tel: 020 7679 3454
> _________________________________
>
>
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