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SCCMAP

Section: User Commands (1)
Updated: 21 March 2001
Index Return to Main Contents

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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 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)

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Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

OPERANDS

DIAGNOSTICS

AUTHORS

SEE ALSO

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