mutuality {sna} | R Documentation

## Find the Mutuality of a Graph

### Description

Returns the mutuality scores of the graphs indicated by `g` in `dat`.

### Usage

    mutuality(dat, g=NULL)

### Arguments

`dat` | one or more input graphs.
`g` | a vector indicating which elements of `dat` should be analyzed; by default, all graphs are included.

### Details

The mutuality of a digraph G is defined as the number of complete dyads (i.e., i<->j) within G. (Compare this to dyadic reciprocity, the fraction of dyads within G which are symmetric.) Mutuality is commonly employed as a measure of reciprocal tendency within the p* literature; although mutuality can be very hard to interpret in practice, it is much better behaved than many alternative measures.

### Value

One or more mutuality scores

### Author(s)

Carter T. Butts buttsc@uci.edu

### References

Moreno, J.L., and Jennings, H.H. (1938). ``Statistics of Social Configurations.'' Sociometry, 1, 342-374.

### See Also

`grecip`

### Examples

    #Create some random graphs
    g<-rgraph(15,3)

    #Get mutuality and reciprocity scores
    mutuality(g)
    grecip(g)         #Compare with mutuality

[Package sna version 1.1 Index]