同一画布绘制两个透视表图表时显示异常的问题求助

Hey there, let's break down why your subplots are showing up out of order and with missing data, then fix it step by step!

What's Causing the Problem? #

The core issue here is that you're creating subplot objects (gh1, gh2) but not telling pandas' plot() method to use them. By default, pandas will generate a new figure for each plot() call instead of using the subplots you've already set up in your existing figure. This leads to:

• The first temp1.plot() creates an unseen figure, then your gh1 subplot ends up being empty (but gets rendered later, making it look like the second plot)
• The temp2.plot() creates another new figure, and your gh2 subplot remains empty with no data

Corrected Code #

Here's the fixed version where we explicitly link each pandas plot to the corresponding subplot using the ax parameter:

import matplotlib.pyplot as plt

# Create the main figure
fig = plt.figure(figsize=(8,6))

# First subplot (left)
gh1 = fig.add_subplot(121)
# Tell pandas to plot onto gh1
temp1.plot(kind='bar', ax=gh1)
gh1.set_xlabel('credit_history')
gh1.set_ylabel('count of credit history')
gh1.set_title('Applicants by credit history')

# Second subplot (right)
gh2 = fig.add_subplot(122)
# Tell pandas to plot onto gh2
temp2.plot(kind='bar', ax=gh2)
gh2.set_xlabel('credit_history')
gh2.set_ylabel('Probability of loan by credit history')
gh2.set_title('Probability of getting loan by credit history')

# Optional: Adjust layout to prevent label overlap
plt.tight_layout()

plt.show()

Key Changes Explained #

• Added ax=gh1 to temp1.plot(): This directs pandas to draw the bar chart directly onto the first subplot we created
• Added ax=gh2 to temp2.plot(): Same for the second subplot
• Added plt.tight_layout(): Ensures titles and labels don't overlap between subplots (a nice quality-of-life tweak)

With these changes, your subplots will appear in the correct order (left: applicant count, right: loan probability) and both will display their respective data properly.

内容的提问来源于stack exchange，提问作者Abhishek Singh