Provided by: scotch_6.0.4.dfsg1-8_amd64

**NAME**

gomtst- compute statistics on sparse matrix orderings

**SYNOPSIS**

gotst[options] [gfile] [ofile] [lfile]

**DESCRIPTION**

Thegotstprogram 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 filegfilecan only be a centralized graph file. Fileofilerepresents the ordering of the symmetric sparse matrix the pattern of which is represented bygfile. The resulting statistics are stored in filelfile. 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 compressed file extension, such as in 'brol.grf.bz2' or '-.gz'. The compression formats which can be supported are the bzip2 format ('.bz2'), the gzip format ('.gz'), and the lzma format ('.lzma', on input only). Sincegotstperforms sequentially the symbolic factorization of matrixgfilein 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**

-hDisplay some help.-VDisplay program version and copyright.

**EXAMPLE**

Display statistics on ordering brol.ord of graph brol.grf: $ gotst brol.grf brol.ord

**SEE** **ALSO**

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

**AUTHOR**

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