1CCOMPS(1) General Commands Manual CCOMPS(1)
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6 ccomps - connected components filter for graphs
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9 ccomps [ -sxvnzC? ] [ -X[#]v ] [ -ooutfile ] [ files ]
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12 ccomps decomposes graphs into their connected components, printing the
13 components to standard output.
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16 The following options are supported:
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18 -s No output graph is printed. The return value can be used to
19 check if the graph is connected or not.
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21 -x Only the connected components are printed, as separate graphs.
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23 -v Counts of nodes, edges and connected components are printed.
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25 -z Sort components by size, with the largest first. This is only
26 effective if either -x or -X#v is present. Thus, -zX#0 will
27 cause the largest component to be printed.
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29 -C Use clusters in computing components in addition to normal edge
30 connectivity. In essence, this gives the connected components of
31 the derived graph in which nodes top-level clusters and nodes in
32 the original graph. This maintains all subgraph structure within
33 a component, even if a subgraph does not contain any nodes.
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35 -n Do not project subgraph structure. Normally, if ccomps produces
36 components as graphs distinct from the input graph, it will
37 define subgraphs which are projections of subgraphs of the input
38 graph onto the component. (If the projection is empty, no sub‐
39 graph is produced.) If this flag is set, the component contains
40 only the relevant nodes and edges.
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42 -X node_name
43 Prints only the component containing the node node_name, if any.
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45 -X# index
46 Prints only component number index, if any, starting at 0.
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48 -o outfile
49 If specified, each graph will be written to a different file
50 with the names derived from outfile. In particular, if both -o
51 and -x flags are used, then each connected component is written
52 to a different file. If outfile does not have a suffix, the
53 first file will have the name outfile; then next outfile_1, then
54 next outfile_2, and so on. If outfile has a suffix, i.e., has
55 the form base.sfx, then the files will be named base.sfx,
56 base_1.sfx, base_2.sfx, etc.
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58 By default, each input graph is printed, with each connected component
59 given as a subgraph whose name is a concatenation of the name of the
60 input graph, the string "_component_" and the number of the component.
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63 The following operand is supported:
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65 files Names of files containing 1 or more graphs in dot format. If
66 no files operand is specified, the standard input will be used.
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69 Unless used to extract a single connected component, ccomps returns 0
70 if all the input graphs are connected; and non-zero if any graph has
71 multiple components, or any error occurred. If just extracting a sin‐
72 gle component, ccomps returns 0 on success and non-zero if an error
73 occurred.
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76 It is possible, though unlikely, that the names used for connected com‐
77 ponents and their subgraphs may conflict with existing subgraph names.
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80 Stephen C. North <north@research.att.com>
81 Emden R. Gansner <erg@research.att.com>
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84 gc(1), dot(1), gvpr(1), gvcolor(1), acyclic(1), sccmap(1), tred(1),
85 libgraph(3)
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89 27 August 2008 CCOMPS(1)