Nothing
.weightedMinPathSum <- function(g, weightfunc) {
stopifnot(.validateGraph(g))
n <- nodes(g)
ig <- .G2IG(g)
sum(sapply(1:length(n), function(v) {
sp <- igraph::get.all.shortest.paths(ig, from=v)$res
sum(sapply(sp, function(path) {
if (length(path) == 1)
1
else
prod(sapply(1:(length(path) - 1), function(i) {
weightfunc(i, n[[path[[i]]]], n[[path[[i + 1]]]])
})) / 2
}))
}))
}
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