compete (version 0.1)

phi: Get the phi skew-symmetry of a sociomatrix.

Description

Get the phi skew-symmetry of a sociomatrix.

Usage

phi(m)

Arguments

m

A matrix with individuals ordered identically in rows and columns.

Value

The phi skew-symmetry index of m.

References

Leiva D et al, 2008, Testing reciprocity in social interactions: A comparison between the directional consistency and skew-symmetry statistics, Behav Res Methods.

Further details

Phi is the skew-symmetry index (0 means completely symmetric, 0.5 means completely not symmetric)

Examples

m <- matrix(c(NA,2,30,6,19,122,0,NA,18,
0,19,85,0,1,NA,3,8,84,0,0,0,NA,267,50,0,
0,0,5,NA,10,1,0,4,4,1,NA), ncol=6)  #table 2, Vervaecke et al. 2000  - fleeing in bonobos
phi(m)