title: Change bar graph x label in MATLAB
body: <p>Suppose that we have this data:</p>
  
  <pre><code>89.9    81.9    90.3
  87.6    84.6    87.7
  87.3    83.0    87.6
  89.7    74.3    90.6
  </code></pre>
  
  <p>Output bar graph:</p>
  
  <p><img src="https://i.stack.imgur.com/fqCVo.jpg" alt="enter image description here"></p>
  
  <p>How can i change <code>xlabel</code> 1,2,3 and 4 default values to some strings like A,B,C and D?</p>