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networks

  

addvertex

  

add a vertex or set of vertices to a graph

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

addvertex(v1, G)

addvertex(v1, v2, G)

addvertex(v1, weights=w, G)

addvertex([v1, v2], weights=[w1, w2], G)

Parameters

G

-

graph or network

v1, v2, ..., vn

-

new vertices for the graph G

w

-

user supplied weight for a vertex (default 0)

Description

• 

Important: The networks package has been deprecated.  Use the superseding command GraphTheory[AddVertex] instead.

• 

This routine adds one or more vertices to a graph. The vertex names used are returned as an expression sequence.

• 

To force addvertex() to use a specific weight for a single vertex use the optional argument (eg. weights=3).

• 

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)

• 

A vertex cannot be a symbol or string beginning with the letter e; these are reserved, by the package, for edge names.

• 

This routine is normally loaded via the command with(networks) but can also be referenced using the full name networks[addvertex](...).

Examples

Important: The networks package has been deprecated.  Use the superseding command GraphTheory[AddVertex] instead.

withnetworks:

newG:

addvertex1,2,3,4,G:

addvertexvname,xx,G:

verticesG

1,2,3,4,vname,xx

(1)

vweight1,G

0

(2)

addvertexn1,n2,weights=5,symwt,G

n1,n2

(3)

vweightn2,G

symwt

(4)

See Also

GraphTheory

GraphTheory[AddVertex]

networks(deprecated)[addedge]

networks(deprecated)[vertices]

with

 


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