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

6       gcv - graph file converter
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SYNOPSIS

9       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, gcv 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').
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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 un‐
37                     symmetric pattern are symmetrized. In case the file  con‐
38                     tains  several matrices, the num parameter allow the user
39                     to provide the index of the matrix to  convert,  starting
40                     from  0. When the num parameter is not set, it is assumed
41                     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       gbase(1), 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                               23 November 2019                         gcv(1)
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