steepness (version 0.2-1)

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

##############################################################################
###               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)