mini / maxi functions



Why are there mini / maxi functions in the descriptive statistics package?
 They seem to be redundant with the base functions lmin and lmax.  Also, the
names mini and maxi are confusing; they would seem to mean the index of the
minimum element (argmin).

There are some differences between lmin and mini:

* mini/maxi handle matrices. Though the documentation doesn't specify the
definition, in fact it is the column-wise min/max (which seems arbitrary,
but whatever).

* lmin/lmax handle sets

* mini/maxi fail for the empty list; lmin/lmax correctly give inf/minf.

* mini( [ [2] ]) gives an error, but mini( [ matrix([2]) ] ) does not. Why?
 min is perfectly happy with either.

Why not merge the functionalities and clean up the discrepancies?

                 -s