MATLAB: Use intersect function in model

Question

Dear all,

I need to get same elements of matrix (follow row) same as intersect function such as following:

1. a = [ 3 0; 3 0; 1 3];
2. b = [ 3 0; 3 1; 1 3];
3. [same,~,~] = intersect(a,b,'rows')
4. > same =
5. 1 3
6. 3 0

I used Matlab Function block and put intersect but has error:

The first operand is not sorted in ascending order. Use SORTROWS first

Anyone knows????

Answer 1

[same,ia,ib] = intersect(a,b,'rows') ;
a(sort(ia),:)