title: What does keras normalize axis argument does?
body: <p>I am a beginner in deep learning and I am working upon the mnist dataset in keras.</p>
  
  <p>I used normalization as</p>
  
  <pre><code>tf.keras.utils.normalize(x_train, axis = 1)
  </code></pre>
  
  <p>I don't understand what does the axis argument means. Can you help me out with this?</p>