title: Matlab choose random color for plotting
body: <p>I have 6 vectors which I want to plot. 
  How I can make each plot with different color (random)?
  With the code below, the plot limited to one color for all six vectors.</p>
  
  <pre><code>plot(x,y,'-rs','LineWidth',1,...
        'MarkerEdgeColor','k',...
        'MarkerFaceColor','g',...
        'MarkerSize',5);
  </code></pre>