Find identical rows in matrices

I have matrix A (1000x3) and matrix B (1200x3), is there an easy way to know what rows of matrix A already exist in Matrix B. Any help is appreciated

Answer 1

[KSSV]

REad about ismember

% Example
A = [1 1 1; 2 3 4; 5 5 5; 8 9 10];
B = [1 1 1;5 5 5];
[c,ia] = ismember(A,B,'rows') ;
A(c,:)

ans = 2×3

1 1 1 5 5 5