title: reducing number of plot ticks
body: <p>I have too many ticks on my graph and they are running into each other.</p>
  
  <p>How can I reduce the number of ticks?  </p>
  
  <p>For example, I have ticks:</p>
  
  <pre><code>1E-6, 1E-5, 1E-4, ... 1E6, 1E7
  </code></pre>
  
  <p>And I only want:</p>
  
  <pre><code>1E-5, 1E-3, ... 1E5, 1E7
  </code></pre>
  
  <p>I've tried playing with the <code>LogLocator</code>, but I haven't been able to figure this out.</p>