Hi,
Please provide a subject with your emails.
The current implementation of TTree::Draw and TTree::Scan differs in the way
they handle arrays. Currently only TTree::Draw take then into account.
TTree::Scan only looks at the first elements of the array. We intend on
upgrading this behavior.
Cheers,
Philippe.
-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Luigi Esposito-MACRO
Sent: Friday, June 27, 2003 3:30 AM
To: roottalk@pcroot.cern.ch
Subject:
Hello to all,
I suppose that the methods TTree::Draw(...) and TTree::Scan(...) do the
same things, the difference is that TTree::Draw(...) does an histogram,
while TTree::Scan(...) write on the standard output or on a file.
But I had this behavour:
root [7] Views->Draw("segments.eTx","abs(segments.eTy+0.008)<0.03 &&
abs(segments.eTx-0.155)<0.03")
(Int_t)120
root [8] Views->Scan("segments.eTx","abs(segments.eTy+0.008)<0.03 &&
abs(segments.eTx-0.155)<0.03")
************************
* Row * segments. *
************************
* 38 * 0.1630210 *
************************
==> 1 selected entry
(Int_t)1
In other words, I have 120 entries for the histograms while only 1 from
the
Scan method.
Where is my misunderstanding?
Actually segments.eTx[] is a vector, but I'd like to scan over all the
elements of this vector.
I'm using ROOT v3.03/09 and you can find my root file (test1.root) and the
necessary libraries (libEdb.so) under /afs/infn.it/bo/user/luillo/public/
I have the same behavour also with ROOT v3.05/05
Thank you,
Luillo
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