RE: Run Graph array macro

From: Fine, Valeri <fine_at_bnl.gov>
Date: Wed, 15 Mar 2006 23:50:20 -0500


add "TGraph gr[4];"

Mmm... Did you mean
add "TGraph *gr[4];"
???

From: Ding Hengtong
Sent: Wed 3/15/2006 10:36 PM
To: Zhu FengRong
Cc: roottalk_at_pcroot.cern.ch
Subject: Re: [ROOT] Run Graph array macro

Hi ,

   You should define "gr[4]" and "i",
that is to say you should add "TGraph gr[4];" and change "for(i=1;i<5;i++)" into "for(Int_t i=1;i<5;i++)" in your macro, then it'll gonna be ok.

uOn Thu, 16 Mar 2006, Zhu FengRong wrote:

> Hello,
> In the root_v4.01.02.Linux.RH7.3.gcc296 environment,I failed to run the
> macro like this:
>
> {
> Float_t a[4]={450,1050,1431,1983};
> Float_t b[4][4]=
> {1576,3420,4854,6635,117,262,402,528,21,53,71,93,4,18,24,28};
> TCanvas *c1=new TCanvas("c1","",1);
> c1->Divide(2,2);
> for(i=1;i<5;i++)
> {
> c1->cd(i);
> gr[i-1]=new TGraph(4,a,b[i-1]);
> gr[i-1]->Draw("AL*");
>
> }
> }
> Would you help me to succeed in running it?
> Thank you in advance.
>
> with best wishes,
> Fengrong Zhu
> Institute of High Energy Physics,
> C.A.S P.R.C
> zhufr_at_ihep.ac.cn
> --
> Open WebMail Project (http://openwebmail.org)
>

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Received on Thu Mar 16 2006 - 05:50:35 MET

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