% -*- texinfo -*-
% @deftypefn {Function File} {} shift (@var{x}, @var{b})
% @deftypefnx {Function File} {} shift (@var{x}, @var{b}, @var{dim})
% If @var{x} is a vector, perform a circular shift of length @var{b} of
% the elements of @var{x}.
%
% If @var{x} is a matrix, do the same for each column of @var{x}.
% If the optional @var{dim} argument is given, operate along this
% dimension
% @end deftypefn