title: ValueError: matplotlib display text must have all code points < 128 or use Unicode strings
body: <p>In my code I get an array like this:</p>
  
  <pre><code>array(['2.83100e+07', '2.74000e+07', '2.79400e+07'],dtype='|S11')
  </code></pre>
  
  <p>How can I "cut" my values like:</p>
  
  <pre><code>2.83100e+07 --&gt; 2.831 ?
  </code></pre>
  
  <p>Best regards!</p>