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

7       gomtst - compute statistics on sparse matrix orderings
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SYNOPSIS

10       gotst [options] [gfile] [ofile] [lfile]
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DESCRIPTION

13       The gotst program computes, in a sequential way, statistics on a sparse
14       matrix ordering, such as fill-in, operation count, and  separator  tree
15       parameters:  minimum,  maximum,  average  height  and  variance  of its
16       leaves.
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18       Source graph file gfile can only be  a  centralized  graph  file.  File
19       ofile  represents  the ordering of the symmetric sparse matrix the pat‐
20       tern of which is represented by gfile.  The  resulting  statistics  are
21       stored  in  file lfile. When file names are not specified, data is read
22       from standard input and written to standard  output.  Standard  streams
23       can also be explicitly represented by a dash '-'.
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25       When  the proper libraries have been included at compile time, gtst can
26       directly handle compressed graphs, both as input and output.  A  stream
27       is  treated  as  compressed  whenever its name is postfixed with a com‐
28       pressed file extension, such as in 'brol.grf.bz2' or '-.gz'.  The  com‐
29       pression  formats which can be supported are the bzip2 format ('.bz2'),
30       the gzip format ('.gz'), and the lzma format ('.lzma', on input only).
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32       Since gotst performs sequentially the symbolic factorization of  matrix
33       gfile  in  order  to  compute fill-in and operation count numbers, this
34       program can take a long time or even run out of memory, when applied to
35       very large graphs.
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OPTIONS

38       -h     Display some help.
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40       -V     Display program version and copyright.
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EXAMPLE

43       Display statistics on ordering brol.ord of graph brol.grf:
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45           $ gotst brol.grf brol.ord
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SEE ALSO

49       gord(1), gtst(1), dgord(1).
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51       Scotch user's manual.
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AUTHOR

54       Francois Pellegrini <francois.pellegrini@labri.fr>
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58                                August 03, 2010                       gotst(1)
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