gotst(1) Scotch user's manual gotst(1)NAME
gomtst - compute statistics on sparse matrix orderings
SYNOPSISgotst [options] [gfile] [ofile] [lfile]
DESCRIPTION
The gotst program computes, in a sequential way, statistics on a sparse
matrix ordering, such as fill-in, operation count, and separator tree
parameters: minimum, maximum, average height and variance of its
leaves.
Source graph file gfile can only be a centralized graph file. File
ofile represents the ordering of the symmetric sparse matrix the pat‐
tern of which is represented by gfile. The resulting statistics are
stored in file lfile. 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, gtst can
directly handle compressed graphs, both as input and output. A stream
is treated as compressed whenever its name is postfixed with a com‐
pressed file extension, such as in 'brol.grf.bz2' or '-.gz'. The com‐
pression formats which can be supported are the bzip2 format ('.bz2'),
the gzip format ('.gz'), and the lzma format ('.lzma', on input only).
Since gotst performs sequentially the symbolic factorization of matrix
gfile in order to compute fill-in and operation count numbers, this
program can take a long time or even run out of memory, when applied to
very large graphs.
OPTIONS-h Display some help.
-V Display program version and copyright.
EXAMPLE
Display statistics on ordering brol.ord of graph brol.grf:
$ gotst brol.grf brol.ord
SEE ALSOgord(1), gtst(1), dgord(1).
Scotch user's manual.
AUTHOR
Francois Pellegrini <francois.pellegrini@labri.fr>
February 14, 2011 gotst(1)
