Pandas - Creating a Heatmap Using Seaborn to Visualize Correlations

Pandas: Visualization Integration Exercise-7 with Solution

Write a Pandas program to create a Heatmap Visualization with Seaborn.

This exercise demonstrates how to create a heatmap using Seaborn to visualize a correlation matrix in a DataFrame.

Sample Solution :

Code :

import pandas as pd
import seaborn as sns
import matplotlib.pyplot as plt

# Create a sample DataFrame
df = pd.DataFrame({
    'Math': [90, 85, 80, 75, 70],
    'Science': [85, 80, 75, 70, 65],
    'English': [80, 75, 70, 65, 60]
})

# Compute the correlation matrix
corr_matrix = df.corr()

# Create a heatmap to visualize the correlation matrix
sns.heatmap(corr_matrix, annot=True)

# Add a title
plt.title('Subject Correlation Heatmap')

# Display the plot
plt.show()

Output:

Explanation:

• Created a DataFrame with grades in different subjects.
• Calculated the correlation matrix using df.corr().
• Used sns.heatmap() to plot the correlation matrix, adding annotations to show correlation values.
• Displayed the heatmap with a title.

Python-Pandas Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.