Hi Alan,
Currently we have no options to draw an histogram with horizontal bars.
You can use the following macro:
Rene Brun
void hori(TH1 *h) {
//Draw histogram h horizontaly with bars
Double_t ymin = h->GetMinimum();
Double_t ymax = 1.05*h->GetMaximum();
TAxis *axis = h->GetXaxis();
Double_t xmin = axis->GetXmin();
Double_t xmax = axis->GetXmax();
Int_t nbins = axis->GetNbins();
TH2F *h2 = new TH2F("h2",h->GetTitle(),10,ymin,ymax,nbins,xmin,xmax);
h2->SetBit(kCanDelete);
h2->SetDirectory(0);
h2->SetStats(0);
h2->Draw();
TBox box;
Int_t color = h->GetFillColor();
if (color == 0) color = 1;
box.SetFillColor(color);
Double_t dy;
Double_t x1,y1,x2,y2;
for (Int_t i=1;i<=nbins;i++) {
dy = axis->GetBinWidth(i);
x1 = 0;
y1 = axis->GetBinCenter(i)-0.3*dy;
x2 = h->GetBinContent(i);
y2 = axis->GetBinCenter(i)+0.3*dy;
box.DrawBox(x1,y1,x2,y2);
}
}
Alan Barr wrote:
>
> Dear rooters,
>
> Is there a way to plot a 1-dimensional histogram rotated by 90 degrees so
> that the bars are horizontal?
>
> Alan
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