networks[ends] - finds the ends of an edge in a graph
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Calling Sequence
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ends(G)
ends(e, G)
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Parameters
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G
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graph or network
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e
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edge or a set or list of edges of G
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Description
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This routine is used to recover the names of the vertices at the ends of a specified edge.
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In the special case where only the graph G is specified then the ends of all of the edges of G are returned as a set.
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If an edge e is directed then the ends are returned as a list of length 2 where the second element is the head. For undirected edges the vertex names are returned as a set. Undirected loops will appear as a set containing one vertex name.
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Specific edges of interest may be specified either individually or as a set or list of edge names. The result will be a vertex pair, a set of vertex pairs, or a list of vertex pairs as appropriate.
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This routine is normally loaded via the command with(networks) but may also be referenced using the full name networks[ends](...).
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Examples
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Important: The networks package has been deprecated. Use the superseding package GraphTheory instead.
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