delim $$ MM2GV(1) General Commands Manual MM2GV(1) 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 adja- cency matrix, with the rows and columns of the matrix specifying 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 el- ement is scaled to the range [0,1] depending on where it lies be- tween the minimum and maximum set matrix values. This scaled value is used as the "wt" attribute of the corresponding edge. In addi- tion, 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" at- tribute 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 pattern 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 matrix will be treated like a bi- partite graph. -ooutfile Prints output to the file outfile. If not given, mm2gv uses stdout. 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 collection of sparse matrices in this format. 31 July 2008 MM2GV(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | RETURN CODES | AUTHORS | ADDITIONAL INFO
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