grf_io

grf_io, a C++ code which reads or writes a GRF file containing information about an abstract graph.

The file includes information about

• adjacency, that is, which nodes are connected to a given node;
• embedding, that is, how to place each node in the unit square so that a drawing of the graph is visually pleasing and "readable".

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

grf_io is available in a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

grf_io_test

floyd, a C++ code which implements Floyd's algorithm for finding the shortest distance between pairs of nodes on a directed graph.

graffiti, a dataset directory which contains 195 abstract graphs, with adjacency and embedding information, stored in the GRF format.

graph_representation, a data directory which contains examples of ways of representing abstract mathematical graphs

grf, a data directory which contains a description of the GRF format and some examples.

Reference:

1. Peter Eades, Ian Fogg, David Kelly,
   SPREMB: A System for Developing Graph Algorithms,
   Congressus Numerantium,
   Volume 66, December 1988.
2. Stephen Skiena,
   Implementing Discrete Mathematics: Combinatorics and Graph Theory in Mathematica,
   Addison Wesley, 1990.
3. https://www.combinatorica.com/
   the COMBINATORICA web page.

• grf_io.cpp, the source code.
• grf_io.sh, compiles the source code.
• grf_io.hpp, the include file.