[ROOT] Two roottalk mailing lists?
From: O'NEEL Bruce (bruce.oneel@obs.unige.ch)
Date: Fri Sep 01 2000 - 14:36:16 MEST
Hi,
I got the message below on an account which I used to be subscribed
to roottalk with. I changed subscriptions a month or so ago, but, I
still get a message or two a day on this account. I get all of my
normal root talk mail on the account I mailed this from. Are there
two roottalk mailing lists?
cheers
bruce
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Date: Fri, 01 Sep 2000 07:51:41 +0000
From: Rene Brun <Rene.Brun@cern.ch>
Organization: CERN
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To: Jeffrey Reid <jgreid@u.washington.edu>
CC: roottalk@cern.ch
Subject: Re: Trouble with TChain
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Reply-To: Rene Brun <Rene.Brun@cern.ch>
Hi Jeff,
Unfortunately you do not mention which version you are using.
A few changes have been applied in versions 2.24 and 2.25 in
TChain::GetEntry.
If you are running with versions older than 2.25/01, I suggest you
install
our current version 2.25/02 and let me know.
In case you are already running with 2.25/02, I will tell you how to
continue the investigation.
Rene Brun
Jeffrey Reid wrote:
>
> Hi all
>
> I'm having trouble with reading a chain of files. I create the chain and
> add my files to it. Then I get the branch that I want and set the address
> to my data (event). The problem comes when I look at the data in the
> event. It seems that I get the data with no problem, but when I reach the
> point in the chain where I should go from the first file to the second I
> get m copies of the last event in the first file in place of the m events
> in the second file. I have checked the files independently and they are
> no corrupt. Am I doing something obviously wrong, or have I come across
> something subtle?
>
> Here's the code where I access the branch after I create the chain and add
> the files...
> ---------------------
>
> TBranch *branch = chain.GetBranch("myBranch");
> branch->SetAddress(&event);
> Int_t nevent = chain.GetEntries();
>
> printf("There are %i events in this chain.\n",nevent);
> Int_t nb = 0;
> for (int i = 0; i < nevent; i++) {
>
> nb += chain.GetEvent(i);
>
> printf("ntuple filled for event %i.\n",event->EventID());
>
> }
--
Greenspun's Tenth Rule of Programming: "Any sufficiently complicated C
or Fortran program contains an ad-hoc, informally-specified bug-ridden
slow implementation of half of Common Lisp."
Bruce O'Neel phone: +41 22 950 91 22 (direct)
INTEGRAL Science Data Centre +41 22 950 91 00 (switchb.)
Chemin d'Ecogia 16 fax: +41 22 950 91 33
CH-1290 VERSOIX e-mail: Bruce.Oneel@obs.unige.ch
Switzerland WWW: http://isdc.unige.ch/
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