
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 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
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 nontrivial strongly connected components, the maximum
degree of the graph, and fraction of nontree 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) 
