Re: [ROOT] TH1F: drawing option 'histe2' and TLegendEntry: Drawing option 'lf'

From: Gero Flucke (gero.flucke@desy.de)
Date: Tue Jul 15 2003 - 11:35:19 MEST


Hi Rene,

On Tue, 15 Jul 2003, Rene Brun wrote:

> Hi Gero,
>
> Gero Flucke wrote:
> >
> > Hi ROOTers,
> >
> > 1)
> > I tried to plot a 1D-histogram with an error band (option 'e2') AND with
> > the line at the mean value. I tried
> >
> > hist->Draw("histe2")
> >
> > but the result is unsatisfactory, cf. script below,
> > I can draw a white histogram with the lower error bounds on top of that,
> > but that is quite annoying... :-(
>
> You should not use the option "hist" to get the error band. If you give this
> option, you will get the normal error band AND also teh normal fill area of teh
> histo.

Yes, that's the problem. But with

>  Just do:
>   hist->Draw(" e2");
>

I do NOT get the line at the central value (bin content) (but the marker
that I am not interested in...).
My aim is to have sth. like
http://www-h1.desy.de/psfiles/figures/H1prelim-03-071.fig2a.eps

I tried some other draw option, but did not succeed.

Cheers

	Gero

> {
>   TH1* hist = new TH1F("hist", "hist", 5, 1, 10);
>   hist->SetBinContent(2, 5.);
>   hist->SetBinError(2, 1.5);
>   hist->SetBinContent(3, 7.);
>   hist->SetBinError(3, 1.);
>   hist->SetBinContent(4, 6.8.);
>   hist->SetBinError(4, .5);
>
>   hist->SetFillColor(kYellow);
>   hist->Draw("histe2");
>   TLegend * l = new TLegend(0.5, 0.9, .99,.99, "header");
>   l->AddEntry(hist, "my hist", "lf");
>   l->Draw();
> }
>



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