'rows' argument in 'create_set' and 'union'

[Muthiah Annamalai]

But does your patch to create_set()

+
+ if (nargin == 1)
+ y = unique(x)';
^
maybe require to use non-hermitian transpose operator?
I think at present your patch could conjugate a set of complex numbers 
for example.

Best,
-Muthu