MATLAB: How to find unique elements from every row within matrix?

Question

y =  [ 90    90   -45     0     0    45    45     0   -45    15    30   -30    75   -45    75   -75
       90    90   -45     0     0   -45   -45     0   -45    15    30   -30    75   -45    75   -45
       90    90   -45     0     0    45    45     0   -45    15    30   -30    75   -45    75   -30
       90    90   -45     0     0    45    45     0   -45    15    30   -30    75   -45    75     0
       90    90   -45     0     0    45    45     0   -45    15    30   -30    75   -45    75    15
       90    90   -45     0     0    45    45     0   -45    15    30   -30    75   -45    75    30
       90    90    45     0     0    45    45     0    45    15    30   -30    75    45    75    45
       90    90   -45     0     0    45    45     0   -45    15    30   -30    75   -45    75    75
       90    90   -45     0     0    45    45     0   -45    15    30   -30    75   -45    75    90];

unique(y) =9;

Please tell me to count unique value in every row, and if unique elements in row less than 9, that row should be deleted.

Answer 1

y0 = sort(y,2);
out = y(sum([ones(size(y,1),1),diff(y0,[],2)~=0],2) >= 9,:);