Hi,
this should not work. Two problems: You can't declare an array of TH2Ds
(or any class, for that matter) like this, and you should not give all
your histograms the same name (root will replace the old one if a new
one with the same name is created).
TH2D *same[8];
char name[2];
strcpy(name,"A");
for (Int_t iSame=0; iSame<8; iSame++){
name[0]=iSame+'A'; // 0th one "A", 1st one "B" etc
same[iSame]=new TH2D(name,name,50, 0., 10., 50, 0., 10.);
}
might work.
Cheers, Axel.
William Love wrote:
>Hello root
> I want to divide track data among identical TH2D's according to
> for example, the vertex z. This would be easiest if I could make and
> address an array of TH2D's I tried:
>
> *** Start at Date : Wed Aug 21 14:10:58 2002
>QAInfo:You are using STAR_LEVEL : dev, ROOT_LEVEL : 3.02.07 and node :
>rcas6006.rcf.bnl.gov
>root.exe [0] TH2D Same[8]("b","b",50, 0, 10, 50, 0, 10)
>root.exe [1] Same[2].SetName("number3")
>
> *** Break *** segmentation violation
>
> Where do I go wrong?
> Bill Love
>
>
>I was up all night wondering where the sun went, then it dawned on me.
>
>
>
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