YO, ZO now take one input by default and two as alternative default

funDef.txt

@@ -641,8 +641,8 @@ YN	0	inf	0		1	1	1		true	true	true	true	out{1} = NaN(in{:});	not-a-number	\matlab
 ZN	1	1	1		1	1	1		true	true	true	true	out{1} = isnan(in{:});	true for not-a-number	\matlab+isnan+
 O	0	inf	0	2	1	1	1		true	true	true	true	if numel(in)==0, out{1} = 0; else out{1} = zeros(in{:}); end	array of zeros	\matlab+zeros+ (if $0$ inputs: produces output $0$)
 XO	1	4	2		1	1	1		true	true	true	true	out{1} = datestr(in{:});	string representation of date	\matlab+datestr+
-YO	1	6	1		1	1	1		true	true	true	true	out{1} = datenum(in{:});	serial date number	\matlab+datenum+
-ZO	1	3	2		1	6	1		true	true	true	true	[out{:}] = datevec(in{:});	date components	\matlab+datevec+
+YO	1	6	1	2	1	1	1		true	true	true	true	out{1} = datenum(in{:});	serial date number	\matlab+datenum+
+ZO	1	3	1	2	1	6	1		true	true	true	true	[out{:}] = datevec(in{:});	date components	\matlab+datevec+
 P	1	2	1	2	1	1	1		true	true	true	true	out{1} = flip(in{:});	flip the order of elements	\matlab+flip+. \sa \matl+XP+
 XP	1	1	1		1	1	1		true	true	true	true	out{1} = flipud(in{:});	flip array in up-down direction	\matlab+flipud+. \sa \matl+P+
 YP	0	0	0		1	1	1		true	true	true	true	out{1} = pi;	pi	\matlab+pi+