getDij | R Documentation |

Function to obtain matrix of dyadic dominance indices corrected for chance from the observed sociomatrix.

getDij(X, names=NULL)

`X` |
Empirical sociomatrix containing wins-losses frequencies in dyadic encounters. |

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

`getDij`

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.

`Dij` |
Matrix of observed dyadic dominance indices corrected for chance. |

David Leiva dleivaur@ub.edu & Han de Vries J.deVries1@uu.nl.

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

`steeptest`

.

############################################################################## ### 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 <- getDij(X,individuals) print(res,digits=3)

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