samer@0: function u=construct(s,sizes_in)
samer@0: 	u=mkunit(s);
samer@0: 	sz=s.sz; fn=s.fn;
samer@0: 	u.sizes_out = guess_sizes(fn,sz);
samer@0: 	u.process   = @proc;
samer@0: 
samer@0: 	function out=proc, out=fn(sz); end
samer@0: end
samer@0: 
samer@0: function sz_out=guess_sizes(fn,sz)
samer@0: 	out = fn(sz);
samer@0: 	sz_out = {size(out)};
samer@0: end
samer@0: