gcv
Section: Scotch user's manual (1)
Updated: 23 November 2019
Page Index
NAME
gcv - graph file converter
SYNOPSIS
gcv [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 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').
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 ALSO
gbase(1),
gtst(1),
gmap(1),
gord(1),
gout(1).
Scotch user's manual.
AUTHOR
Francois Pellegrini <
francois.pellegrini@labri.fr>