SCCMAP(1)                                                                                                              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 compo-
       nents.  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 connected 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  connected  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 <northATresearch.com>
       Emden R. Gansner <ergATresearch.com>

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



                                                          21 March 2001                                                SCCMAP(1)