title: Color some samples of MATLAB figure with different color
body: <p>I have a discrete signal x of length N traced in MATLAB using the command</p>
  <pre><code>stem(abs(x)); axis([0 N+6 0 4]);
  </code></pre>
  <p>The resulted figure is shown below:</p>
  <p><a href="https://i.stack.imgur.com/iFKPA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iFKPA.png" alt="enter image description here" /></a></p>
  <p>My question I need only some values corresponding for example to index [7 10 11 12 15 18 48 50 52 60] to be colored with different color , let's say with red.
  How can I do that into my figure ?</p>