gcv - graph file converter

       Francois Pellegrini <francois.pellegrini@labri.fr>

                                                23 November 2019                                          gcv(1)

       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').

       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

gcv - graph file converter

-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.

gbase(1), gtst(1), gmap(1), gord(1), gout(1).

       Scotch user's manual.

gcv [options] [igfile] [ogfile] [oxfile]