- graph file converter
gcv [options] [igfile] [ogfile] [oxfile]
program converts Scotch graph files from and to other external
is converted into graph file ogfile
, with optional
geometry data being put in geometry file oxfile
, if it is available.
When file names are not specified, data is read from standard input and written
to standard output. Standard streams can also be explicitly represented by a
When the proper libraries have been included at compile time, gcv
directly handle compressed graphs, both as input and output. A stream is
treated as compressed whenever its name is postfixed with a compressed file
extension, such as in 'brol.grf.bz2' or '-.gz'. The compression formats which
can be supported are the bzip2 format ('.bz2'), the gzip format ('.gz'), and
the lzma format ('.lzma', on input only).
- Display some help.
- Set format of input graph file, which can be:
- Boeing-Harwell format. This is a matrix format. Only square
matrices are supported. Square matrices with unsymmetric pattern are
symmetrized. In case the file contains several matrices, the num
parameter allow the user to provide the index of the matrix to convert,
starting from 0. When the num parameter is not set, it is assumed
to be 0.
- Chaco format. This is an adjacency graph format, also used
- Matrix Market format. This is a matrix format describing
individual edges. Matrix pattern is symmetrized, such that rectangular
matrices are eventually squared.
- Scotch graph format. This is an adjacency graph
- Set format of output graph file, which can be:
- Chaco format.
- Matrix Market symmetric pattern format.
- Scotch format. This is the default.
- Display program version and copyright.
Convert a Matrix Market graph into a Scotch graph. Matrix Market files do not
comprise geometry data, so no geometry file is needed on output:
$ gcv -im brol.mm brol.grf
Scotch user's manual.
Francois Pellegrini <firstname.lastname@example.org>