RE: ntuples

["JJ Gomez-Cadenas" <gomez at ific dot uv dot es>]

Hi Gilles,
I'm also a high energy physicist...and if I am correct half of the GSL team
has a theoretical background in particle physics too!

I have been using CERNLIB for twenty years. It's a great collection of
useful mathematical and utility routines, but it has little to do with GSL.
Not only the fact that is written in Fortran, but the design (GSL HAS a
design, CERNLIB is just a collection more or less well sorted of algorithm)
and the techniques are different (GSL source is available and the
programming techniques are really modern). The scope is also different, GSL
focus in numerical methods, CERNLIB is wider and more diffuse.

In any case, CERNLIB is and was great and the HEP community has not found, I
believe, a proper replacement for it (although there are a number of efforts
going on, for instance the LIZARD project at CERN). I am firmly convinced
that GSL will soon find its way in our comunity, please advertize it!

Your question on ntuples. I don't think any one is going to convert ntuples
from GSL into PAW ntuples. PAW is "officialy" obsolete, although in practice
is still widely used. The only alternative is ROOT which anyway comes from
the same people (but you can use C++ --sort of-- with ROOT, check it out).

best,

jj gomez-cadenas

-----Mensaje original-----
De: gsl-discuss-owner@sources.redhat.com
[mailto:gsl-discuss-owner@sources.redhat.com]En nombre de Brian Gough
Enviado el: viernes, 22 de marzo de 2002 10:33
Para: gsl-discuss@sources.redhat.com
CC: Gilles Barouch
Asunto: Fwd: ntuples


I'm forwarding your message to the gsl-discuss@sources.redhat.com list.

----- Forwarded message from Gilles Barouch <gilles.barouch@cern.ch> -----
    Date: Thu, 21 Mar 2002 18:51:49 +0100
    From: Gilles Barouch <gilles.barouch@cern.ch>
Reply-To: Gilles Barouch <gilles.barouch@cern.ch>
      To: bjg@network-theory.co.uk


I just discovered gsl and I can't figure out how I could have missed it!!!
It seems that it is possible to make "ntuples". This term comes from High
Energy Physics.
I use CENRLIB to create the ntuple which can be analysed with a great
software from CERN which is called Paw. Pb : CERNLIB is written in Fortran
and is quite painfull to interface with C or C++.
Do you know any people who developp a code that can convert the NTUPLE
created with gsl to a file (called hbook) which can be read by Paw ?

Thanks,

PS : do you know cernlib ? It really looks like what you are doing ... but
in Fortran.




----- End forwarded message -----