Transform a matlab function into a cached function (result stored in a file).

cached.m

function varargout = cached(cache_filepath, f, varargin )

if exist(cache_filepath, 'file') == 2
	load(cache_filepath, 'varargout');
else
	[varargout{1:nargout}] = f( varargin{:} );
	save(cache_filepath, 'varargout');
end

end