# The following code illustrates a bug in the pyplot.subplots function of version 1.3 of matplotlib
import matplotlib.pyplot as plt

# The following works as expected
fig1, axes1 = plt.subplots(1, 2, sharex=True)
axes1[0].plot([1,2,3], [4,5,6])
axes1[1].plot([1,2,3], [11, 12, 13])

# The following does not work as expected
fig2, axes2 = plt.subplots(1, 3, sharey=True)
axes2[0].plot([1,2,3], [4,5,6])
axes2[1].plot([1,2,3], [11, 12, 13])

plt.show()