rvmin applies the function min to each component of the argument x.
Missing values are removed. rvmax applies the function max to each component of the argument x.
Missing values are removed.
rvrange applies the function range to each component of
the argument x. Missing values are removed.
min.rv returns the minimum of the random vector,
returning thus one random variable. Similarly max.rv returns
the maximum of a vector.
pmin.rv and pmax.rv returns the componentwise minima or
maxima of several random vectors or constants, yielding thus a random
vector of the same length.