Euclidean distance between two vectors (single row matrix)

Question

I have two vectors (single row matrices). Assume that we already know the length len.

A = [ x1 x2 x3 x4 x5 .... ]
B = [ y1 y2 y3 y4 y5 .... ]
         


        

Answer 1

diff = A - B;
distance = sqrt(diff * diff');

or

distance = norm(A - B);