Nothing
bertz <- function(g,dist=NULL,deg=NULL){
if(class(g)[1]!="graphNEL"){
stop("'g' must be a 'graphNEL' object")
}
stopifnot(.validateGraph(g))
if(is.null(dist)){
dist <- distanceMatrix(g)
}
if(is.null(deg)){
deg <- graph::degree(g)
}
Ni <- .cardNi(g,dist,deg)
N <- sum(Ni)
return((2*N*log2(N))- sum(Ni*log2(Ni)))
}
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