Keep only one set-cordinate (x,y) per x.

I have:

x y

1 2 <

1 3

1 3

2 4 <

2 4

2 6

3 7 <

3 8

5 6 <

5 8

I want to keep:

x y

1 2

2 4

3 7

5 6

How to do it in efficient way?

Answer 1

[Jim Timon]

xy=[1 2; 1 3; 1 3; 2 4; 2 4; 2 6; 3 7; 3 8; 5 6; 5 8];
[~,ind] = unique(xy(:,1))
xy(ind,:)

Answer 2

[madhan ravi]

xy(1:2:end,:)

[Jim Timon]

I want to keep one set (x,y) per x number. I updated the question