title: matlab contourf with gradual change of color
body: <p>folks,</p>
  
  <p>I have an image matrix and created the following figure using </p>
  
  <pre><code>contourf(my_matrix)
  colorbar
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/lFppW.png" alt="enter image description here"></p>
  
  <p>Is it possible to make the color change gradually between the contour lines, instead of filling these spaces with solid color?</p>
  
  <p>Thanks very much for your help.</p>