#GrUMPy 0.8
Graphics for Understanding Mathematical Programming in Python (GrUMPy) is a Python library for visualizing various aspects of mathematical programming, including visualizations of the branch-and process, branch-and-bound trees, polyhedra, cutting plane methods, etc. The goal is clarity in implementation rather than eficiency. Most methods have an accompanying visualization and are thus appropriate for use in the classroom.
Documentation for the API is here:
http://pythonhosted.org/coinor.grumpy
Installation:
easy_install coinor.grumpy
##Installation Notes
- GrUMPy depends on GiMPy, which will be automatically installed as part of the setup. However, in order for GiMPy to visualize the branch-and-bound tree, it's necessary to install GraphViz and choose one of these additional methods for display:
- Recommanded: xdot along with
PyGtk and call
set_display_mode('xdot') - Python Imaging Library and
call
set_display_mode('PIL') - Pygame and call
set_display_mode('pygame') - Call
set_display_mode('file')to just write files to disk that have to then be opened manually.
It is also possible to typeset labels in LaTex and to output the graph in
LaTex format using dot2tex. After installing dot2tex, this can be done
by simply calling the method write(basename='fileName', format='dot'), and
then doing dot2tex --tmath fileName.dot or by calling
set_display_mode('dot2tex') and then display() as usual. At the moment,
the latter only seems to work with version 2.9.0dev available
here. For the former method, just
using easy_install dot2tex should work fine.
2. GrUMPy can also visualize 2D polyhedra with the installation of
pypolyhedron, which must be
installed from source.
##Examples
