function swap(x, y)

% swap -- Swap two variables.
%  swap(x, y) swaps variables x and y in the
%   caller's workspace, where they must have
%   actual names.  Note: no output arguments.
 
% Copyright (C) 1998 Dr. Charles R. Denham, ZYDECO.
%  All Rights Reserved.
%   Disclosure without explicit written consent from the
%    copyright owner does not constitute publication.
 
% Version of 12-Nov-1998 15:21:41.

if nargin < 2, help(mfilename), return, end

assignin('caller', inputname(1), y)
assignin('caller', inputname(2), x)