Neighborhood

As of Version 10, most of the functionality of the Combinatorica package is built into the Wolfram System. »

Neighborhood[g,v,k]

returns the subset of vertices in g that are at a distance of k or less from vertex v.

Neighborhood[al,v,k]

behaves identically, except that it takes as input an adjacency list al.

Details and Options

Neighborhood functionality is now available in the built-in Wolfram Language function NeighborhoodGraph.
To use Neighborhood, you first need to load the Combinatorica Package using Needs["Combinatorica`"].

Wolfram Language code: Needs["Combinatorica`"]

Wolfram Language code: g = FromUnorderedPairs[{{1, 2}, {2, 3}, {3, 4}, {3, 1}}];

Wolfram Language code: ShowGraph[g]

Wolfram Language code: Neighborhood[g, 1, 1]

Neighborhood has been superseded by NeighborhoodGraph:

Wolfram Language code: g = Graph[{12, 23, 34, 31}]

Wolfram Language code: VertexList[NeighborhoodGraph[g, 1, 1]]

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