How to delete extra plots on a AxesSubplot object?

Question

I have a AxesSubplot object ax1 from this:

fig = plt.figure()
ax1 = fig.add_subplot(2, 2, 1)

I plot multiple times on this ax1 to see how alpha values will set the plots' appearance:

first = ax1.hist(np.random.randn(100), bins=20, color='k', alpha=0.3)
second = ax1.hist(np.random.randn(100), bins=20, color='k', alpha=0.6)
third = ax1.hist(np.random.randn(100), bins=20, color='k', alpha=0.9)

But these three plots overlap each other:

How can I erase the former histogram , then only show one plot each time? And by the way, what does the alpha arg do?

Thanks. :)

Richard Rublev · Accepted Answer · 2018-03-04 09:08:05Z

1

If I understand what you want,then try this

import numpy as np
import matplotlib.pyplot as plt

fig = plt.figure()
ax1 = fig.add_subplot(2, 2, 1)
ax2 = fig.add_subplot(2, 2, 2)
ax3 = fig.add_subplot(2, 2, 3)

Output

first = ax1.hist(np.random.randn(100), bins=20, color='k', alpha=0.3)
second = ax2.hist(np.random.randn(100), bins=20, color='k', alpha=0.6)
third = ax3.hist(np.random.randn(100), bins=20, color='k', alpha=0.9)

plt.show()

edited Mar 4, 2018 at 9:08

answered Mar 4, 2018 at 7:19

Richard Rublev

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