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2gcv(1)                       Scotch user's manual                       gcv(1)
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NAME

7       gcv - graph file converter
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SYNOPSIS

10       gcv [options] [igfile] [ogfile] [oxfile]
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DESCRIPTION

13       The  gcv program converts Scotch graph files from and to other external
14       file formats.
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16       File igfile is converted into graph file ogfile, with optional geometry
17       data being put in geometry file oxfile, if it is available.
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19       When file names are not specified, data is read from standard input and
20       written to standard output. Standard streams  can  also  be  explicitly
21       represented by a dash '-'.
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23       When the proper libraries have been included at compile time, dgtst can
24       directly handle compressed graphs, both as input and output.  A  stream
25       is  treated  as  compressed  whenever its name is postfixed with a com‐
26       pressed file extension, such as in 'brol.grf.bz2' or '-.gz'.  The  com‐
27       pression  formats which can be supported are the bzip2 format ('.bz2'),
28       the gzip format ('.gz'), and the lzma format ('.lzma', on input only).
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OPTIONS

31       -h     Display some help.
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33       -iifmt Set format of input graph file, which can be:
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35              bnum   Boeing-Harwell format. This is  a  matrix  format.   Only
36                     square  matrices  are  supported.  Square  matrices  with
37                     unsymmetric pattern are symmetrized.  In  case  the  file
38                     contains  several  matrices,  the num parameter allow the
39                     user to provide the  index  of  the  matrix  to  convert,
40                     starting from 0. When the num parameter is not set, it is
41                     assumed to be 0.
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43              c      Chaco format. This is an  adjacency  graph  format,  also
44                     used by MeTiS.
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46              m      Matrix  Market format. This is a matrix format describing
47                     individual edges. Matrix  pattern  is  symmetrized,  such
48                     that rectangular matrices are eventually squared.
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50              s      Scotch graph format. This is an adjacency graph format.
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52       -oofmt Set format of output graph file, which can be:
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54              c      Chaco format.
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56              m      Matrix Market symmetric pattern format.
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58              s      Scotch format. This is the default.
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60       -V     Display program version and copyright.
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EXAMPLE

63       Convert  a Matrix Market graph into a Scotch graph. Matrix Market files
64       do not comprise geometry data, so no geometry file is needed on output:
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66           $ gcv -im brol.mm brol.grf
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SEE ALSO

70       gtst(1), gmap(1), gord(1), gout(1).
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72       Scotch user's manual.
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AUTHOR

75       Francois Pellegrini <francois.pellegrini@labri.fr>
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79                                August 03, 2010                         gcv(1)
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