title: How to set range for contour matlab
body: <p>As far as I know, I can set number of contour lines, but they will be distributed evenly from min value to max value(for example, from 0.4 to 2.3). How can I set range for contour lines from 0.54 to 1.7 with step 0.04?</p>
  
  <p>I use that function like that <code>contour(x,y,po,20,'LineColor',[0 0 0]);</code></p>