title: Number of the positive (> 0) values in each row of a matrix
body: <p>Considering A = a 100 by 5 matrix of random integers between -100 and 100, I would like to find B = the number of the positive (>= 0) values in each row of A using sum (no loops). </p>
  
  <p><code>B=sum(rint(:)&gt;0)</code> does not seem right as it only gives me the total number of positive values of the whole matrix.</p>
  
  <p>How do I get the values for each row? </p>
  
  <p>Thank you!</p>