steepness (version 0.3-0)

getPij: Matrix of win proportions -Pij-

Description

Function to obtain matrix of win proportions from the observed sociomatrix.

Usage

getPij(X, names=NULL)

Arguments

X

Empirical sociomatrix containing wins-losses frequencies in dyadic encounters.

names

Character vector with the names of individuals. This vector is NULL by default

Value

Pij

Matrix of observed win proportions.

Details

getPij is only applied for square matrices in which the set of n actors is also the set of n partners. The matrices must also be numeric.

References

de Vries, H., Stevens, J. M. G., & Vervaecke, H. (2006). Measuring and testing the steepness of dominance hierarchies. Animal Behaviour, 71, 585-592.

See Also

steeptest.

Examples

# NOT RUN {
##############################################################################
###               Example taken from Vervaecke et al. (2007):              ###
##############################################################################

X <- matrix(c(0,58,50,61,32,37,29,39,25,8,0,22,22,9,27,20,10,48,
              3,3,0,19,29,12,13,19,8,5,8,9,0,33,38,35,32,57,
              4,7,9,1,0,28,26,16,23,4,3,0,0,6,0,7,6,12,
              2,0,4,1,4,4,0,5,3,0,2,1,1,5,8,3,0,10,3,1,3,0,0,4,1,2,0),
              nrow=9,byrow=TRUE)

individuals <- c("V","VS","B","FJ","PR","VB","TOR","MU","ZV")

res <- getPij(X,individuals)

print(res,digits=3)

# }