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1 .TH GC 1 "21 March 2001"
2 .SH NAME
3 gc \- count graph components
4 .SH SYNOPSIS
5 .B gc
6 [
7 .B \-necCaDUrs?
8 ]
9 [
10 .I files
11 ]
12 .SH DESCRIPTION
13 .B gc
14 is a graph analogue to
15 .B wc
16 in that it prints to standard output
17 the number of nodes, edges, connected components or clusters contained
18 in the input files.
19 It also prints a total count for
20 all graphs if more than one graph is given.
21 .SH OPTIONS
22 The following options are supported:
23 .TP
24 .B \-n
25 Count nodes.
26 .TP
27 .B \-e
28 Count edges.
29 .TP
30 .B \-c
31 Count connected components.
32 .TP
33 .B \-C
34 Count clusters. By definition, a cluster is a graph or
35 subgraph whose name begins with "cluster".
36 .TP
37 .B \-a
38 Count all. Equivalent to
39 .B \-encC
40 .TP
41 .B \-r
42 Recursively analyze subgraphs.
43 .TP
44 .B \-s
45 Print no output. Only exit value is important.
46 .TP
47 .B \-D
48 Only analyze directed graphs.
49 .TP
50 .B \-U
51 Only analyze undirected graphs.
52 .TP
53 .B \-?
54 Print usage information.
55 .LP
56 By default,
57 .I gc
58 returns the number of nodes and edges.
59 .SH OPERANDS
60 The following operand is supported:
61 .TP 8
62 .I files
63 Names of files containing 1 or more graphs in dot format.
64 If no
65 .I files
66 operand is specified,
67 the standard input will be used.
68 .SH "EXIT STATUS"
69 The following exit values are returned:
70 .TP 4
71 .B 0
72 Successful completion.
73 .TP
74 .B 1
75 The
76 .B \-U
77 or
78 .B \-E
79 option was used, and a graph of the wrong type was encountered.
80 .SH AUTHOR
81 Emden R. Gansner <erg@research.att.com>
82 .SH "SEE ALSO"
83 wc(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), tred(1), libgraph(3)