% -*- texinfo -*-
% @deftypefn {Mapping Function} {} pow2 (@var{x})
% @deftypefnx {Mapping Function} {} pow2 (@var{f}, @var{e})
% With one argument, computes
% @tex
% $2^x$
% @end tex
% @ifnottex
% 2 .^ x
% @end ifnottex
% for each element of @var{x}.
%
% With two arguments, returns
% @tex
% $f \cdot 2^e$.
% @end tex
% @ifnottex
% f .* (2 .^ e).
% @end ifnottex
% @seealso{log2, nextpow2}
% @end deftypefn