[FIXED] Matplotlib - axvlines across subplots

Issue

How to draw vertical lines across multiple subplots? Whatever I try axvlines are shown only in the bottom subplot:

import pandas as pd
import matplotlib.pyplot as plt

fig, zx = plt.subplots(5,1, gridspec_kw={'height_ratios':[1,1,1,1,1]})
fig.subplots_adjust(hspace=0.01)

pd.DataFrame({'A':[1,2,3,4,5]}).plot( grid = True, ax=zx[2])

for x_val in [2.25,3.25,4.25]:
    plt.axvline(x_val, color = 'green')

pd.DataFrame({'B':[6,5,4,3,2]}).plot( grid = True, ax=zx[3])

for x_val in [2.25,3.25,4.25]:
    plt.axvline(x_val, color = 'red')

plt.show()

Solution

You can use axes, zx like this to draw line:

import pandas as pd
import matplotlib.pyplot as plt

fig, zx = plt.subplots(5,1, gridspec_kw={'height_ratios':[1,1,1,1,1]})
fig.subplots_adjust(hspace=0.01)

pd.DataFrame({'A':[1,2,3,4,5]}).plot( grid = True, ax=zx[2])

for x_val in [2.25,3.25,4.25]:
    zx[2].axvline(x_val, color = 'green')

pd.DataFrame({'B':[6,5,4,3,2]}).plot( grid = True, ax=zx[3])

for x_val in [2.25,3.25,4.25]:
    zx[3].axvline(x_val, color = 'red')

plt.show()

Answered By - Scott Boston