Hello Izabela, You may use the following: --> x = [1.1 1.1 3.2; 2.3 1.1 1.1; 4.7 5.2 5.2] x = 1.1 1.1 3.2 2.3 1.1 1.1 4.7 5.2 5.2 --> r = tabul(x); r(r(:,2)==1,1) ans = 4.7 3.2 2.3 Samuel