selecting unique values

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

[Andrei Bobrov]

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

[kash]

thanks andrei