gcv(1) Scotch user's manual gcv(1)NAMEgcv - graph file converter
SYNOPSISgcv [options] [igfile] [ogfile] [oxfile]
DESCRIPTION
The gcv program converts Scotch graph files from and to other external
file formats.
File igfile 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 dash '-'.
When the proper libraries have been included at compile time, gcv can
directly handle compressed graphs, both as input and output. A stream
is treated as compressed whenever its name is postfixed with a com‐
pressed file extension, such as in 'brol.grf.bz2' or '-.gz'. The com‐
pression formats which can be supported are the bzip2 format ('.bz2'),
the gzip format ('.gz'), and the lzma format ('.lzma', on input only).
OPTIONS-h Display some help.
-iifmt Set format of input graph file, which can be:
bnum 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.
c Chaco format. This is an adjacency graph format, also
used by MeTiS.
m Matrix Market format. This is a matrix format describing
individual edges. Matrix pattern is symmetrized, such
that rectangular matrices are eventually squared.
s Scotch graph format. This is an adjacency graph format.
-oofmt Set format of output graph file, which can be:
c Chaco format.
m Matrix Market symmetric pattern format.
s Scotch format. This is the default.
-V Display program version and copyright.
EXAMPLE
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
SEE ALSOgbase(1), gtst(1), gmap(1), gord(1), gout(1).
Scotch user's manual.
AUTHOR
Francois Pellegrini <francois.pellegrini@labri.fr>
February 14, 2011 gcv(1)
