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

6       gomtst - compute statistics on sparse matrix orderings
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SYNOPSIS

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

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

37       -h     Display some help.
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39       -V     Display program version and copyright.
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EXAMPLE

42       Display statistics on ordering brol.ord of graph brol.grf:
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44             $ gotst brol.grf brol.ord
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SEE ALSO

48       gord(1), gtst(1), dgord(1).
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50       Scotch user's manual.
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AUTHOR

53       Francois Pellegrini <francois.pellegrini@labri.fr>
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57                              September 08, 2008                      gotst(1)
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