title: Change size of markers in scatter3
body: <p>I want to draw a set of points each with different colors.</p>
  
  <p>Unfortunately the dots become really small. How can I change that?</p>
  
  <p>This is how my code looks right now, but it is not working</p>
  
  <pre><code>% Draw with different colors
  colors = ['b'; 'k'; 'r'; 'g'; 'm'; 'y'; 'c']
  hold on;
  for i = 1:7
      x = cell2mat(cluster_l(i))
      scatter3(x(:,1),x(:,2),x(:,3), strcat(colors(i), '.'), 'MarkerSize', 12);
  end
  </code></pre>
  
  <p>But apparantly there is no MarkerSize property on the Scatter class.</p>