Find and remove data from array that does not match 2nd array

I have two arrays. Array A has data which I would like to mimimize based on the contents of array B.

For example, Array A is:

[3, 10, 100;

5, 20, 200;

7, 30, 300;

5, 40, 400;

6, 50 500]

Array B is

[6; 7]

I would like to keep only the rows of array A, which match ANY of the contents of array B:

i.e. in Column 1 of Array A, row 3 and row 5 have values which match contents in Array B (6 & 7).

Note: numbers are random, and wil not be in order

So the final result would like to be:

[7, 30, 300;

6, 50 500]

Answer 1

[Image Analyst]

Use ismember():

A = [3, 10, 100;
	5, 20, 200;
	7, 30, 300;
	5, 40, 400;
	6, 50 500]
B = [6; 7]
[ia, ib] = ismember(B, A)
C = A(ib,:)