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Version: Version 3 (fedora - 01/12/10)

Section: 1 (Commandes utilisateur)


hadd - Merge ROOT histogram files into one file


hadd outputfile inputfiles ...


This program will add histograms from a list of ROOT files and write them to a target ROOT file. The target file is newly created and must not be identical to one of the source files.



For extensive documentation on the ROOT system, see

A Users Guide is avaliable from here.

The classes of ROOT are all documented by the automatic documentation system, and is available online.


 Sven A. Schmidt, Dirk Geppert, and Rene Brun This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA


This manual page was written by Christian Holm Christensen <>, for the Debian GNU/Linux system (but may be used by others).
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