title: MATLAB plot- Filtering data before plotting
body: <p>I have a 90x2 matrix <code>a</code> where a(:,1) is the x and a(:,2) is the y.</p>
  
  <p>I want to plot only values where y is greater than BOOM. How can I do that? </p>
  
  <p>Currently I have</p>
  
  <pre><code>plot(a(:,1),a(:,2));
  </code></pre>
  
  <p>One more thing, how can I display the numbers in full and not <code>num*10^4</code>?</p>