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gc

NAME

gc - count graph components

SYNOPSIS

gc [ -necCaDUrs? ] [ files ]

DESCRIPTION

gc is a graph analogue to wc in that it prints to standard output the number of nodes, edges, connected components or clusters contained in the input files. It also prints a total count for all graphs if more than one graph is given.

OPTIONS

The following options are supported:

-n

Count nodes.

-e

Count edges.

-c

Count connected components.

-C

Count clusters. By definition, a cluster is a graph or subgraph whose name begins with "cluster".

-a

Count all. Equivalent to -encC

-r

Recursively analyze subgraphs.

-s

Print no output. Only exit value is important.

-D

Only analyze directed graphs.

-U

Only analyze undirected graphs.

-?

Print usage information.

By default, gc returns the number of nodes and edges.

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.

EXIT STATUS

The following exit values are returned:

0

Successful completion.

1

The -U or -E option was used, and a graph of the wrong type was encountered.

AUTHOR

Emden R. Gansner <erg@research.att.com>

SEE ALSO

wc(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), tred(1), libgraph(3)