RE: [ROOT] variable size two dimensional array

From: Philippe Canal (pcanal@fnal.gov)
Date: Mon Jul 26 2004 - 18:39:33 MEST

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Hi Hajme,

I will be looking at this problem as soon as I can.

Cheers,
Philippe.

-----Original Message-----
From: Hajime Nanjyo [mailto:nanjyo@icepp.s.u-tokyo.ac.jp]
Sent: Monday, July 26, 2004 1:58 AM
To: Rene.Brun@cern.ch; pcanal@fnal.gov
Cc: roottalk@pcroot.cern.ch
Subject: Re: [ROOT] variable size two dimensional array


Dear Rene and Philippe,

This is the similar mail to the mail sent about 3 weeks before.
I am still wating your help. (I understand you are busy.)

Is it possible to make a variable size two dimensional array for ROOT I/O
and to draw it in ROOT session with 'TTree::Draw();'?

A small example was attached to indicate the problem.

I used the ROOT at /afs/cern.ch/sw/root/v4.00.08/rh73_gcc32/root
under Red Hat Linux 7.3 with gcc version 3.2.

Best Regards,
Hajime

P.S 
In a case of variable size one dimensional array,
program codes like below succeed.
-----------------------------------------------------------------
      A.h          |       A.C           |   in ROOT session
-----------------------------------------------------------------
int  *a;     //[n] | a  = new int[n];    | tree->Draw("a[]");
-----------------------------------------------------------------

If a syntax 'int (*aa)[3];//[n]' is supported in rootcint,
similar codes as follows will probably be possible. 
-----------------------------------------------------------------
      A.h          |       A.C           |   in ROOT session
-----------------------------------------------------------------
int (*aa)[3];//[n] | aa = new int[n][3]; | tree->Draw("aa[][]");
-----------------------------------------------------------------
Could you implement this if possible?

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