Hi Thomas,
You forgot to specify teh option "a" when drawing the graph.
g->Draw("ap"); for example.
The option "a" will compute theg pad range and draw a frame
Rene Brun
Thomas Feser wrote:
>
> Hi again,
>
> I fortunately managed now to store my TGraphErrors objects properly into
> a root file. (I posted that question yesterday.)
>
> The problem now is:
> I can't draw them the way I'd like to have it.
> My steps are:
> - After starting CINT, I say
> - TFile *myfile = TFile::Open("myfile.root")
> - myfile->cd();
> - TGraphErrors *g = NULL;
> - g = (TGraphErrors*) myfile->Get("my_TGraphErrors_Object");
> The pointer g does not point to 0 after this step any more, therefore the
> object seems to have been found. However, both
> - g->Draw();
> and
> - g->Draw("P");
> produce an empty default "TCanvas"es only. Am I missing an important step
> here?
>
> I can draw the graph by clicking through the TBrowser menus, but in the
> root versions I'm using (I tried 2.24.04 and 2.25.03) the DrawPanel for
> graphs is not yet included. So I can't get rid of the lines between the
> points that are drawn by default, which I have to.
>
> Thanks in advance,
> _
> |om
>
> ------------------------------------------------------------------------
> - Thomas Feser -
> - -
> - Institut fuer Physik phone: +49-6131-39-25165 -
> - ETAP/AMANDA fax: +49-6131-39-25169 -
> - Staudingerweg 7 / 04-426 -
> - D-55099 Universitaet Mainz -
> - -
> - Thomas.Feser@uni-mainz.de -
> - http://iphcip1.physik.uni-mainz.de/~tfeser -
> ------------------------------------------------------------------------
This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:37 MET