Bug report

Bug summary

The scale on the y-axis is missing in some logarithmic plots.

Code for reproduction:

import matplotlib.pyplot as plt

x = [1, 2]
y = [3.7, 3.8]

plt.plot(x,y)
plt.yscale("log")
plt.show()

Actual outcome

Expected outcome

There should be a scale on the y-axis. Without the scale, you can't tell what the value of y is.

Matplotlib version

• Operating system: Linux
• Matplotlib version: 2.2.2
• Matplotlib backend (print(matplotlib.get_backend())): TkAgg
• Python version: 3.5.2
• Jupyter version (if applicable):
• Other libraries: