MATLAB: Selecting unique values

Question

i have a matrix and i have to select unique values based on first column
i.e
1  2  3  
3  4   6
1  4   6
i need as
1  2  3  
3  4   6

please help

Answer 1

in this case:

I = [1  2  3
     3  4  6
     1  4  6]
[b b] = unique(I(:,1),'first')
out = I(b,:)

please read about unique