bargraph.pl: a bar graph builder that supports stacking and clustering.
Modifies gnuplot's output to fill in bars and add a legend.
For complete documentation see
  http://www.burningcutlery.com/derek/bargraph/

Copyright (C) 2004-2014 Derek Bruening <iye@alum.mit.edu>
http://www.burningcutlery.com/derek/bargraph/
https://github.com/derekbruening/bargraph

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.

This program 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
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.

Main features:
* Stacked bars of 9+ datasets
* Clustered bars of 8+ datasets
* Clusters of stacked bars
* Lets you keep your data in table format, or separated but listed in
  the same file, rather than requiring each dataset to be in a separate file
* Custom gnuplot command pass-through for fine-grained customization
   without having a separate tool chain step outside the script
* Color control
* Font face control and limited font size control
* Automatic arithmetic or harmonic mean calculation
* Automatic legend creation
* Automatic sorting, including sorting into SPEC CPU 2000 integer and 
  floating point benchmark groups

Multiple data sets can either be separated by =multi,
  or in a table with =table.  Does support incomplete datasets,
  but issues warning.
For clusters of stacked bars, separate your stacked data for each
  cluster with =multi or place in a table, and separate (and optionally
  name) each cluster with multimulti=
For complete documentation see
  http://www.burningcutlery.com/derek/bargraph/