Nothing
rowVars <-
function(x, ...) {
n <- NCOL(x)
newn <- n - rowSums(is.na(x))
val <- (rowSums(x ^ 2, ...) - newn * rowMeans(x, ...) ^ 2) / (newn - 1)
val <- replace(val, which((newn) < 2), NA)
val
}
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