title: NameError: name 'history' is not defined
body: <p>Setting up the Model, Setting up Training and Validation Data for the experiment, Model Training has executed. But after training of the neural network, during Visualizing the Training Process, I received an error.</p>
  <pre><code>import matplotlib.pyplot as plt
  %matplotlib inline
  
  acc=history.history['categorical_accuracy']
  val_acc=history.history['val_categorical_accuracy']
  loss=history.history['loss']
  val_loss=history.history['val_loss']
  
  epochs=range(1,len(acc)+1)
  plt.xlabel('Epochs')
  plt.ylabel('Accuracy')
  plt.plot(epochs, acc, 'bo', label='Training acc')
  plt.plot(epochs, val_acc, 'b', label='Validation acc')
  plt.title('Training and validation accuracy')
  plt.legend()
  plt.figure()
  
  plt.plot(epochs, loss, 'bo', label='Training loss')
  plt.plot(epochs, val_loss, 'b', label='Validation loss')
  plt.title('Training and validation loss')
  plt.xlabel('Epochs')
  plt.ylabel('Loss')
  plt.legend()
  plt.show()
  </code></pre>
  <pre><code>NameError                                 Traceback (most recent call last)
  &lt;ipython-input-7-e1591c31f061&gt; in &lt;module&gt;()
        2 get_ipython().magic('matplotlib inline')
        3 
  ----&gt; 4 acc=history.history['categorical_accuracy']
        5 val_acc=history.history['val_categorical_accuracy']
        6 loss=history.history['loss']
  
  NameError: name 'history' is not defined
  </code></pre>