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networks[addvertex] - add a vertex or set of vertices to a graph
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Calling Sequence
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addvertex(v1, G)
addvertex(v1, v2, G)
addvertex(v1, weights=w, G)
addvertex([v1, v2], weights=[w1, w2], G)
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Parameters
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G
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graph or network
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v1, v2, ..., vn
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new vertices for the graph G
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w
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user supplied weight for a vertex (default 0)
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Description
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This routine adds one or more vertices to a graph. The vertex names used are returned as an expression sequence.
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To force addvertex() to use a specific weight for a single vertex use the optional argument (eg. weights=3).
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If more than one vertex is to be added, they can be presented as a list or set of vertices. In this case, non-default weights must also be specified as a list of weights as in: addvertex([1, 3], weights=[0, 0], G)
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A vertex cannot be a symbol or string beginning with the letter e; these are reserved, by the package, for edge names.
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This routine is normally loaded via the command with(networks) but can also be referenced using the full name networks[addvertex](...).
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