title: ROC curve for a binary classifier in MATLAB
body: <p>I have a binary classifier, which classifies an input X as class zero if its predicted value is below some threshold (say <code>T</code>), and one otherwise.
  <br>I have all predicted and actual values for every input. So I can have both predicted class and actual class of an input.</p>
  
  <p>Now I want to have the ROC curve for this classifier with MATLAB. How should I do it?</p>