isolates {sna} | R Documentation

## List the Isolates in a Graph or Graph Stack

### Description

Returns a list of the isolates in the graph or graph set given by `dat`.

### Usage

    isolates(dat, diag=FALSE)

### Arguments

`dat` | one or more input graphs.
`diag` | boolean indicating whether adjacency matrix diagonals (i.e., loops) contain meaningful data.

### Value

A vector containing the isolates, or a list of vectors if more than one graph was specified

### Author(s)

Carter T. Butts buttsc@uci.edu

### References

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

West, D.B. (1996). Introduction to Graph Theory. Upper Saddle River, NJ: Prentice Hall.

### See Also

`is.isolate`, `add.isolates`

### Examples

    #Generate a test graph
    g<-rgraph(20)
    g[,4]<-0          #Create an isolate
    g[4,]<-0

    #List the isolates
    isolates(g)

[Package sna version 1.1 Index]