


SCCMAP(1)                                               SCCMAP(1)


NAME
       sccmap - extract strongly connected components of directed graphs

SYNOPSIS
       sccmap [-dsv] [ 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.

       -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                         1


