Obtain the Neighborhood of a Given Vertex

Description

get.neighborhood returns the IDs of all vertices belonging to the in, out, or combined neighborhoods of v within network x.

Usage

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get.neighborhood(x, v, type = c("out", "in", "combined"),
    na.omit=TRUE)

Arguments

x

an object of class network

v

a vertex ID

type

the neighborhood to be computed

na.omit

logical; should missing edges be ignored when obtaining vertex neighborhoods?

Details

Note that the combined neighborhood is the union of the in and out neighborhoods – as such, no vertex will appear twice.

Value

A vector containing the vertex IDs for the chosen neighborhood.

Author(s)

Carter T. Butts buttsc@uci.edu

References

Butts, C. T. (2008). “network: a Package for Managing Relational Data in R.” Journal of Statistical Software, 24(2). http://www.jstatsoft.org/v24/i02/

Wasserman, S. and Faust, K. 1994. Social Network Analysis: Methods and Applications. Cambridge: Cambridge University Press.

See Also

get.edges, is.adjacent

Examples

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#Create a network with three edges
m<-matrix(0,3,3)
m[1,2]<-1; m[2,3]<-1; m[3,1]<-1
g<-network(m)

#Examine the neighborhood of vertex 1
get.neighborhood(g,1,"out")
get.neighborhood(g,1,"in")
get.neighborhood(g,1,"combined")

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