Nothing
mathellinger <-
function(x) {
if (!is.folder(x))
stop("x must be an object of class 'folder'.")
if (any(!apply(x[[1]], 2, is.numeric)))
stop("Non numeric column(s) in the data frames in x.")
distances = diag(0, nrow = length(x))
dimnames(distances) = list(names(x), names(x))
for (i in 2:length(x)) for (j in 1:(i-1)) {
distances[i, j] = distances[j, i] = hellinger(x[[i]], x[[j]])
}
as.dist(distances)
}
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