Nothing

```
radial.ranking <-
function(object)
{
if(!is_igraph(object))
stop("'object' must be of class igraph. See package igraph for details")
mst.matrix.unweighted <- as_adjacency_matrix(object, attr=NULL, sparse=FALSE)
mst.unweighted <- graph_from_adjacency_matrix(mst.matrix.unweighted,
weighted=NULL, mode="undirected")
sp <- apply(shortest.paths(mst.unweighted), 1, max)
spw <- apply(shortest.paths(object), 1, max)
new.sp <- sp + spw/max(spw)
radius <- min(new.sp)
center <- which(new.sp == radius)
if (length(center) > 1) center <- center[1]
ranktree <- sort(shortest.paths(mst.unweighted)[, center] +
(shortest.paths(object)[, center]/max(shortest.paths(object)[, center])),
decreasing=FALSE, index.return=TRUE)
radial_ranking <- ranktree$ix
return(radial_ranking)
}
```

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