title: Set Matlab's Contour graph x-axis scale?
body: <p>I am trying to graph a contour graph with a two dimentional matrix, <code>v</code>. v contains velocity data, y-index represents depth, x-index is mapped to a 1d-vector containing latitude info, <code>lat</code>. </p>
  
  <p>when I graph <code>contour(v)</code>, the x-axis is index, but I wish to show the latitude (also scale accordingly), I tried contour(lat,v) but it just shows me a blank graph, how should I graph it?</p>