% -*- texinfo -*-
% @deftypefn {Function File} {} range (@var{x})
% @deftypefnx {Function File} {} range (@var{x}, @var{dim})
% If @var{x} is a vector, return the range, i.e., the difference
% between the maximum and the minimum, of the input data.
%
% If @var{x} is a matrix, do the above for each column of @var{x}.
%
% If the optional argument @var{dim} is supplied, work along dimension
% @var{dim}.
% @end deftypefn