scotch_gbase(1) [debian man page]

gbase(1)						       Scotch user's manual							  gbase(1)

NAME

       gbase - sets the base value of a source graph

SYNOPSIS

       gbase [options] bval [igfile] [ogfile]

DESCRIPTION

       The  gbase  program allows one to set to bval the base value of a source graph, that is, the starting index used to number its vertices and
       edges. The base value can be set to 0 or 1, so that graphs can be easily imported from and/or exported to tools written in  C  or  Fortran.
       Scotch can handle graphs irrespective of their base value.

       When  the  proper  libraries  have  been included at compile time, gbase 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).

OPTIONS

       -h     Display some help.

       -V     Display program version and copyright.

EXAMPLE

       Set the base of graph 'brol.grf' to 1, and write the modified graph to file 'brol_b1.grf'.

	   $ gbase 1 brol.grf brol_b1.grf

SEE ALSO

       gcv(1), gmk_hy(1), gmk_msh(1), gtst(1), gmap(1), gord(1).

       Scotch user's manual.

AUTHOR

       Francois Pellegrini <francois.pellegrini@labri.fr>

								 February 14, 2011							  gbase(1)

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

NAME

       gomtst - compute statistics on sparse matrix orderings

SYNOPSIS

       gotst [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 pattern
       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 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).

       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 ALSO

       gord(1), gtst(1), dgord(1).

       Scotch user's manual.

AUTHOR

       Francois Pellegrini <francois.pellegrini@labri.fr>

								 February 14, 2011							  gotst(1)