BUG? subplot with sharex clears axes

[jluttine]

I found that providing the sharex keyword argument to subplot clears previously drawn lines from the axes:

import matplotlib.pyplot as plt
plt.figure()
ax = plt.subplot(2,1,1)
plt.subplot(2,1,2)
plt.plot([1,2,3])

# why the following clears the plotted line???
plt.subplot(2,1,2, sharex=ax)

I suppose it is a bug?

[NelleV]

You are creating a new axes object on top of the previous one. This isn't a bug.

[jluttine]

Ok, so if I call subplot with a different sharex value than before, it will create a new axes object. (?) Good to know, I did not notice this info in the docs. Thanks!