Rotate existing matplotlib markers?

Question

I'm aware of this answer, Is it possible to control matplotlib marker orientation?, and the marker documentation, but is it possible to take an existing matplotlib marker symbol (nonregular polygon) and rotate it?

Specifically, I would like to rotate the thin diamond symbol ("d") 90 degrees, such that its long axis is horizontal.

Answer 1

The marker "d" is a skewed version of a diamond, "D". You may create such diamond marker and skew it in the other direction.

For arbitrary angles, you may rotate the marker instead.

import matplotlib.pyplot as plt
from matplotlib.markers import MarkerStyle

fig, ax = plt.subplots()

plt.scatter([1,2,3],[1,2,3], s=225, marker="d")

m = MarkerStyle("D")
m._transform.scale(1.0, 0.6)

plt.scatter([1,2,3],[2,3,4], s=225, marker=m, color="crimson")

m = MarkerStyle("d")
m._transform.rotate_deg(60)

plt.scatter([1,2,3],[3,4,5], s=225, marker=m, color="limegreen")

plt.margins(0.5)
plt.show()