The following two functions might be worth adding to the distribution:
**************************************************************
as.ordered <- function(x) {
if (is.ordered(x)) x else ordered(x)
}
data.class <- function(x) {
if (length(cl <- class(x)))
cl[1]
else {
l <- length(dim(x))
if (l == 2)
"matrix"
else if (l > 0)
"array"
else
mode(x)
}
}
**************************************************************
Re data.class: Couldn't we introduce a "matrix" and an
"array" class
right away? (I already asked this once). The functions for creating or
coercing such objects could easily add the corresponding class
attribute ...
-k
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