title: how to fill colors between contours in matlab
body: <p>I have plotted multiple contours in matlab with the hold on command, using the contour function of MatLab. How can I go ahead if I want to fill color between the first and the last contour. I tried contourf function but it didnt work out that way.</p>
  
  <p>Thanks in advance.</p>
  
  <p>I have written two simple lines which plots the zero level set contour after every iterations.</p>
  
  <pre><code>      hold on;
        contour(X,Y,phi,[0,0],'r');
  </code></pre>