Exclude elements from array [duplicate]

Answer 1

EDIT: If you want to remove row 4 and 5 it is this, if you want to remove the rows with fours and fives check the other answers.

Simple as this

A = [1; 2; 3; 4; 4; 5; 5; 7];     
B = [4; 5];

A(B)=[];