Cross product in Simulink

Question

Ram 2013-6-29

Hi

I am looking to evaluate the cross product of vectors that exist in 2 nx3 matrices in simulink.

My inputs are two matrices A - nx3 and B - nx3.

My output C is such that C(i,:) = cross(A(i,:),B(i,:)). i=1,2,3,....,n.

n is unknown as A and B are variable-sized signals.

Is there a way in which this can be implemented in Simulink without resorting to MATLAB functions.

Thanks,

Ram.

Roger Stafford 2013-6-29

I corrected the sign in my answer. Sorry.

Answer 1

Roger Stafford 2013-6-29

编辑：Roger Stafford 2013-6-29

Can you do this in Simulink:

 t1 = [2,3,1];
 t2 = [3,1,2];
 C = A(:,t1).*B(:,t2)-A(:,t2).*B(:,t1);

If so, that will give you the cross product of A and B at each row.

(Corrected the sign. It should be minus.)

Ram 2013-6-29

Thanks. It works really well.