title: How to show multiple images in one figure?
body: <p>I use Python lib <code>matplotlib</code> to plot functions, and I know how to plot several functions in different <strong>subplot</strong>s in one figure, like this one, <img src="https://i.stack.imgur.com/teDM5.png" alt="enter image description here"></p>
  
  <p>And when handling images, I use <strong>imshow()</strong> to plot images, but how to plot multiple images together in different subplots with one figure?</p>