title: Placing Custom Images in a Plot Window--as custom data markers or to annotate  those markers
body: <p>I have a set of 150x150px png images, and a set of (x, y) coordinates that they correspond to. Is there a way to plot the images on a grid? For example, I'm looking for an R or Python solution to create something like the following:
  <img src="https://i.stack.imgur.com/6gW9Z.png" alt="enter image description here"></p>