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Actually you can just do

ax.vlines(x, 0, 1, transform=ax.get_xaxis_transform())

which is quite simpler.

In addition to what @anntzer said, would you mind making the example's docstring sphinx-gallery compatible?

Here's a PR that did just that for a few examples: https://github.com/matplotlib/matplotlib/pull/7331/files

The basic format for that is as follows:

"""
====================
Title of the example
====================

A more detailed description of the example. Discuss what
each subplot is demonstrating and talk about broader
concepts.
"""

import numpy as np
import matplotlib.pyplot as plt

# yada yada yada

############################################################################
# You can also include :math:`math` inline, or as separate equations:
#
# .. math::
#
#    \exp(j\pi) = -1

plt.show()

Hi @bjodah
Do you think you'd have time to finish up the minor comments on this PR? If you need help on anything, don't hesitate to ask.
N

I've added a small commit adding the docstring.

Build failure is unrelated PEP8 issues #8237.