ellipse not showing up - python matplotib

Question

I am trying to plot an ellipse.

ax = plt.subplot(111)
ellipse = Ellipse(mean1L, ellipse_x, ellipse_y, angle=theta)
ax.add_artist(ellipse)
plt.show()

Every argument seems fine, but it isn't showing up. What am I doing wrong?

Answer 1

The ellipse is outside of the axis limits.

Instead of ax.add_artist(ellipse) you would rather use

ax.add_patch(ellipse)

to be able to adjust the axis limits easily to the added patch. This will allow to later call ax.autoscale_view() to automatically adjust the axis limits.

import matplotlib.pyplot as plt
from matplotlib.patches import Ellipse
ax = plt.subplot(111)

ellipse = Ellipse((2,2), 1,1.5 , angle=60)
ax.add_patch(ellipse)

ax.autoscale_view()
plt.show()