A function that calculates how many entries' value and location are the same between two matrices

I would like some guidance on how I can create a function that calculates how many entries' value and location are the same between two matrices.

For example

If I have A = [2 8 3; 4 8 9; 2 8 9] and B = [1 8 4; 3 8 6; 2 8 7]

How can I create a function that displays that the number of matching entries are 4? (in the example, it would be the 8's along the 2nd column and the 2 on (3,1); they have the same value and location)

edit: correction made

Answer 1

[Anand]

Shouldn't the answer be 4? The 2's at location(3,1) also match.

Answer 2

[Anand]

Try this:

nnz(A==B)

Ideally, you should be taking into account differences arising from floating point precision by defining some tolerance as follows:

nnz(abs(A-B)<100*eps)