Thanks for the input, all. The Tlist suggestion worked fine for my
purposes, as the need to preserve the array order has become moot. Thanks
anyway
-Jason
On Thu, 15 May 2003 jgonzalez@neuub0.physics.neu.edu wrote:
>
> Hi this is just a message regarding Jason's question
>
> Couldn't you write the histograms into a TTree? that would solve the
> problem of comparing it to other TTrees with histograms. Then you have the
> problem of random access, so you decide.
>
> One problem I see with Rene's method is that if you have something else in
> your directory you would write that too. That's not big deal though.
>
> does this make sense?
>
> Javier
>
> > Date: Wed, 14 May 2003 21:25:30 +0200 (MEST)
> > From: Rene Brun <Rene.Brun@cern.ch>
> > Subject: Re: [ROOT] Writing array of histograms
> >
> > Hi Jason,
> >
> > This is quite easy to do. Let me assume that you have created several
> > histograms TH1 *h1,*h2,*h3, etc in the current directory.
> > You can get a pointer to the list in memory with
> > TList *list = gDirectory->GetList();
> >
> > then write this list as one single key in a Root file with:
> > TFile f("junk.root","new");
> > list->Write("allhists",TObject::kSingleKey);
> >
> > To read the list again in memory, you can do
> > TFile f("junk.root");
> > TList *list = (TList*)f.Get("allhists");
> > list->ls();
> >
> > Rene Brun
>
>
>
>
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