Nothing
mean.sc.degree <-
function (tab, sc)
{
if(is.null(tab))
stop("Pmf table is null. Does any node have this strain code?\n")
mtab <- margin.table(tab, sc)
sum <- 0
for (i in 1:length(mtab)) {
sum <- sum + as.numeric(names(mtab)[i]) * mtab[i]
}
names(sum) <- NULL
sum
}
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