function theResult = switchsafe(x)
% switchsafe -- Make an empty item safe for "switch" command.
% switchsafe(x) returns a version of x, where x is empty,
% that is safe to use in a "switch" statement.
% Copyright (C) 2002 Dr. Charles R. Denham, ZYDECO.
% All Rights Reserved.
% Disclosure without explicit written consent from the
% copyright owner does not constitute publication.
% Version of 19-Mar-2002 14:58:56.
% Updated 08-Apr-2002 10:46:04.
if nargin < 1, help(mfilename), return, end
if isempty(x), x = ''; end
if nargout > 0
theResult = x;
assignin('caller', 'ans', x)