unknowns: Calculate the number of unknown relationships in a sociomatrix
Description
Calculate the number of unknown relationships in a sociomatrix
Usage
unknowns(m)
Arguments
m
A matrix with individuals ordered identically in rows and columns.
Value
The number of unknown relationships in m
Further details
An unknown relationship is defined as one whereby M(i,j)==M(j,i)==0 .
The zeros in each cell of dyads that have this property may be
referred to as structural zeros.