Nothing
compactness <- function(g, dist=NULL, wien=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(wien)){
wien <- wiener(g,dist)
}
nV <- numNodes(g)
return (4*wien/(nV*(nV-1)))
}
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