Hi,
Thanks for reminding. It was a clerical error while am typing it in
roottalk.
I re-submit again. I rechecked again my original code
Am using the notation "->" not the "." notation.
I used ROOT 3.05/05 gcc 3.3.3 Redhat 9.0
///////////////////////////////////////////////////////////
> >Why is the ff. always givves a "illegal pointer" message?
> >
> > TMultiGraph * mg = new TMultiGraph();
> > TGraph * G[100];
> > .....
> > for (int i ....) {
> > mg->Add(G[i]);
> > }
> >
> > mg->Draw("ap");
> > mg->GetXaxis()->SetTitle("TIiiii");
> > gPad->Modified();
> >
> >
> >
> >I wanted to put an X label as well as Y Label.
> >
> >I tried, TAxis * axis = (TAxis *)mg->GetXaxis();
> > axis->SetTitle("XTITLE");
> >
> >But illegal pointer message again.
> >
> >How ever, I can make this with TGraph.
> >Why? Isnt it true that TMultigraph is just related to TGraph?
> >Could this be a bug?
////////////////////////////////////////////////////////////////////
>
> You must be careful with '.' and '->' operators. After *mg = new ....
> you can use only '->' notation to resolve object methods and variables,
> 'cause 'mg' is the pointer, not the very object. So change mg. to mg->
> everywhere.
>
> Best regards,
>
> Stanislav.
>
> zaldy wrote:
>
> >Hello,
> >
> >
> >Why is the ff. always givves a "illegal pointer" message?
> >
> > TMultiGraph * mg = new TMultiGraph();
> > TGraph * G[100];
> > .....
> > for (int i ....) {
> > mg.Add(G[i]);
> > }
> >
> > mg.Draw("ap");
> > mg->GetXaxis()->SetTitle("TIiiii");
> > gPad->Modified();
> >
> >
> >
> >I wanted to put an X label as well as Y Label.
> >
> >I tried, TAxis * axis = (TAxis *)mg->GetXaxis();
> > axis->SetTitle("XTITLE");
> >
> >But illegal pointer message again.
> >
> >How ever, I can make this with TGraph.
> >Why? Isnt it true that TMultigraph is just related to TGraph?
> >Could this be a bug?
> >
> >
> >Thanks
> >
> >I used ROOT 3.05/05 gcc 3.3.3 Redhat 9.0
> >
> >
> >
>
>
--
--------------------------------------------------------
Zaldy A. Nawang
PS Users Room 2
Yon Gokan,
E362, Neutrino Group,
IPNS, KEK,
Japan
e-mail: zaldy@neutrino.kek.jp
Tel. No. : (81) 029864 - 5387
--------------------------------------------------------
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:14 MET