How to use custom png image marker with plot?

Question

I would like to utilize customer markers in both scatter and line charts. How can I make custom marker out of a PNG file?

Answer 1

Following on from Mark's answer. I just thought I would add to this a bit because I tried to run this and it does what I want with the exception of actually displaying the icons on the graph. Maybe something has changed with matplotlib. It has been 4 years.

The line of code that reads:

ax.get_frame().set_alpha(0)

does not seem to work, however

ax.patch.set_alpha(0)

does work.