title: What is the meaning of axis=-1 in keras.argmax?
body: <p>I am a beginner in Keras and need help to understand <code>keras.argmax(a, axis=-1)</code> and <code>keras.max(a, axis=-1)</code>. What is the meaning of <code>axis=-1</code> when <code>a.shape = (19, 19, 5, 80)</code>? And also what will be the output of <code>keras.argmax(a, axis=-1)</code> and <code>keras.max(a, axis=-1)</code>?</p>