title: Fixing Confusion Matrix plot lines
body: <p>I am trying to plot a confusion matrix as shown below</p>
  <pre><code>cm  = confusion_matrix(testY.argmax(axis=1), predictions.argmax(axis=1))
  
  disp = ConfusionMatrixDisplay(confusion_matrix=cm, display_labels=lb.classes_)
  disp = disp.plot(include_values=True, cmap='viridis', ax=None, xticks_rotation='horizontal')
  
  plt.show()
  </code></pre>
  <p>The result:</p>
  <p><img src="https://i.stack.imgur.com/k5avy.png" alt="Confusion Matrix I get" /></p>
  <p>As you can see, it's showing the axes of the boxes instead of outlining the boxes. I can't see the numbers outside the yellow boxes, because of the axes. I am not good with plots. So I can't find out what I need to change.</p>
  <p>What I expect:
  <img src="https://i.stack.imgur.com/9npk1.png" alt="Expected Matrix" /></p>
  <p><strong>FOUND SOLUTION</strong></p>
  <pre><code>plt.tick_params(axis=u'both', which=u'both',length=0)
  plt.grid(b=None)
  </code></pre>