Rechercher une page de manuel

Chercher une autre page de manuel:


Langue: en

Autres versions - même langue

Version: 331355 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)


ccomps - connected components filter for graphs


ccomps [ -sxvnzC? ] [ -X[#]v ] [ -ooutfile ] [ files ]


ccomps decomposes graphs into their connected components, printing the components to standard output.


The following options are supported:
No output graph is printed. The return value can be used to check if the graph is connected or not.
Only the connected components are printed, as separate graphs.
Counts of nodes, edges and connected components are printed.
Sort components by size, with the largest first. This is only effective if either -x or -X#v is present. Thus, -zX#0 will cause the largest component to be printed.
Use clusters in computing components in addition to normal edge connectivity. In essence, this gives the connected components of the derived graph in which nodes top-level clusters and nodes in the original graph. This maintains all subgraph structure within a component, even if a subgraph does not contain any nodes.
Do not project subgraph structure. Normally, if ccomps produces components as graphs distinct from the input graph, it will define subgraphs which are projections of subgraphs of the input graph onto the component. (If the projection is empty, no subgraph is produced.) If this flag is set, the component contains only the relevant nodes and edges.
-X node_name
Prints only the component containing the node node_name, if any.
-X# index
Prints only component number index, if any, starting at 0.
-o outfile
If specified, each graph will be written to a different file with the names derived from outfile. In particular, if both -o and -x flags are used, then each connected component is written to a different file. If outfile does not have a suffix, the first file will have the name outfile; then next outfile_1, then next outfile_2, and so on. If outfile has a suffix, i.e., has the form base.sfx, then the files will be named base.sfx, base_1.sfx, base_2.sfx, etc.

By default, each input graph is printed, with each connected component given as a subgraph whose name is a concatenation of the name of the input graph, the string "_component_" and the number of the component.


The following operand is supported:
Names of files containing 1 or more graphs in dot format. If no files operand is specified, the standard input will be used.


Unless used to extract a single connected component, ccomps returns 0 if all the input graphs are connected; and non-zero if any graph has multiple components, or any error occurred. If just extracting a single component, ccomps returns 0 on success and non-zero if an error occurred.


It is possible, though unlikely, that the names used for connected components and their subgraphs may conflict with existing subgraph names.


Stephen C. North <>
Emden R. Gansner <>


gc(1), dot(1), gvpr(1), gvcolor(1), acyclic(1), sccmap(1), tred(1), libgraph(3)
Trois Anneaux pour les Rois Elfes sous le ciel,
Sept pour les Seigneurs Nains dans leurs demeures de pierre,
Neuf pour les Hommes Mortels destinés au trépas,
Un pour le Seigneur des Ténèbres sur son sombre trône
Dans le pays de Mordor où s'étendent les Ombres.
Un Anneau pour les gouverner tous, Un Anneau pour les trouver,
Un Anneau pour les amener tous et dans les ténèbres les lier
Au Pays de Mordor où s'étendent les Ombres.