how to take out two random equal column in different matrix

i have two different matrix and one 10*10 environment which it generate nodes randomly and put the coordinates of nodes inside the both matrix the dimension of matrixes are N(2,n) and M(2,n),how can i command that in matlab like this example

size=1
while size<n

      if M(1,size)=N(1,size); M(2,size)=N(1,size);

          Reach=1; ReachG=size; break

      end 

end