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MM2GV(1)		    General Commands Manual		      MM2GV(1)

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NAME
       mm2gv - Matrix Market-DOT converters

SYNOPSIS
       mm2gv [ -cluv?  ] [ -Ui ] [ -ooutfile ] [ file ]

DESCRIPTION
       mm2gv  converts	a sparse matrix	of the Matrix Market format to a graph
       in the GV (formerly DOT)	format.	 If the	matrix M is  not  square,  the
       graph  is  considered bipartite and the matrix is viewed	as a bipartite
       graph adjacency matrix, with the	rows and columns of the	matrix	speci-
       fying  the  two sets of vertices. Equivalently, the matrix is converted
       into a symmetric	square matrix

	   0	   M
       $M sup T$   0
       a block matrix with square blocks of 0's	in the upper  left  and	 lower
       right, the upper	right block being M and	the lower left block being the
       transpose of M.	This matrix is then viewed as the adjacency matrix  of
       the graph.

       For  a  square matrix, mm2gv uses it directly as	an adjacency matrix if
       its pattern of non-zero entries is symmetric; otherwise,	it will	 treat
       it  as  a bipartite graph as with the case of non-square	matrices. This
       behavior	can be modified	by the -U flag.

OPTIONS
       The following options are supported:

       -c     This flag	causes mm2gv to	assign colors to the edges. The	matrix
	      element  is scaled to the	range [0,1] depending on where it lies
	      between the minimum and maximum set matrix values.  This	scaled
	      value  is	 used as the "wt" attribute of the corresponding edge.
	      In addition, this	scalar value is	mapped to an RGB value,	 which
	      is stored	as the edge "color".

       -l     If  set, mm2gv attaches a	label to the graph indicating the base
	      name of the input	file, and the number of	nodes and edges.

       -u     If specified, the	graph is assumed to be undirected. By default,
	      the graph	generated is directed.

       -v     This  flag  causes mm2gv to store	the matrix values as the "len"
	      attribute	of the corresponding edge.

       -Ubflag
	      Specifies	how square matrices are	handled.  If  bflag  is	 0,  a
	      square matrix will always	be treated as an adjacency matrix.  If
	      bflag is 1 (the default),	a square matrix	with a symmetric  pat-
	      tern  of	non-zero  entries will be used as an adjacency matrix;
	      otherwise, it will be used a bipartite graph.  If	bflag is 2,  a
	      symmetric	matrix will be used as an adjacency matrix; otherwise,
	      it will be used a	bipartite graph.  If bflag is 3, any input ma-
	      trix will	be treated like	a bipartite graph.

       -ooutfile
	      Prints output to the file	outfile. If not	given, mm2gv uses std-
	      out.

       OPERANDS
	      The following operand is supported:

       file    Name of the file	in MatrixMarket	format.	 If no file operand is
	       specified, the standard input will be used.

RETURN CODES
       Return  0  if there were	no problems during conversion; and non-zero if
       any error occurred.

AUTHORS
       Yifan Hu	<yifanhu@yahoo.com>
       Emden R.	Gansner	<erg@graphviz.com>

ADDITIONAL INFO
       See http://math.nist.gov/MatrixMarket/ for description  of  the	format
       and  http://www.cise.ufl.edu/research/sparse/matrices/ for a large col-
       lection of sparse matrices in this format.

				 31 July 2008			      MM2GV(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | RETURN CODES | AUTHORS | ADDITIONAL INFO

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