SCCMAP(1)						      General Commands Manual							 SCCMAP(1)

NAME

       sccmap - extract strongly connected components of directed graphs

SYNOPSIS

       sccmap [-dsv] [ -ooutfile ] [ files ]

DESCRIPTION

       sccmap  decomposes  digraphs  into strongly connected components and an auxiliary map of the relationship between components.  In this map,
       each component is collapsed into a node.  The resulting graphs are printed to standard out.  The number of nodes, edges and  strongly  con-
       nected components are printed to standard error.  sccmap is a way of partitioning large graphs into more manageable pieces.

OPTIONS

       The following options are supported:

       -d     Preserve degenerate components of only one node.

       -s     Do not print the resulting graphs. Only the statistics are important.

       -S     Just print the resulting graphs. No statistics are printed.

       -ooutput
	      Prints output to the file output. If not given, sccmap uses stdout.

       -v     Generate	additional  statistics.  In  particular, sccmap prints the number of nodes, edges, connected components, and strongly con-
	      nected components, followed by the fraction of nodes in a non-trivial strongly connected	components,  the  maximum  degree  of  the
	      graph, and fraction of non-tree edges in the graph.

OPERANDS

       The following operand is supported:

       files   Names of files containing 1 or more graphs in dot format.  If no files operand is specified, the standard input will be used.

DIAGNOSTICS

       sccmap emits a warning if it encounters an undirected graph, and ignores it.

AUTHORS

       Stephen C. North <north@research.att.com>
       Emden R. Gansner <erg@research.att.com>

SEE ALSO

       gc(1), dot(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), tred(1), libgraph(3)

								   21 March 2001							 SCCMAP(1)