How to Select a distinct subset of a CellArray

Hello,

please consider the following problem:

x = {1,1;1,2;1,3;2,1;2,2}

[C,IA,IC] = unique(x(:,1))

C(1) % ==> is 1, now I want to get all rows of x where we have a 1 in the first column.

Would be super glad to get a tip how to achieve that!

Answer 1

[David Sanchez]

v = find(x(:,1)==C(1))

Answer 2

[Andrei Bobrov]

x = [1,1;1,2;1,3;2,1;2,2];

out = x(x(:,1) == 1,:);