How to plot a bar chart for a list in Python matplotlib?

To plot a bar chart for a list in Python matplotlib, we can use the plt.bar() function. A bar chart displays categorical data with rectangular bars whose heights represent the values.

Basic Bar Chart

Here's how to create a simple bar chart from a list of values ?

import matplotlib.pyplot as plt

# List of data points
data = [5, 3, 8, 2, 7, 4, 6]

# Create bar chart
plt.bar(range(len(data)), data)
plt.xlabel('Categories')
plt.ylabel('Values')
plt.title('Bar Chart from List')
plt.show()

Bar Chart with Custom Labels

You can add custom labels for better readability ?

import matplotlib.pyplot as plt

# Data and labels
values = [25, 30, 15, 40, 35]
categories = ['A', 'B', 'C', 'D', 'E']

# Create bar chart with labels
plt.bar(categories, values, color='skyblue')
plt.xlabel('Categories')
plt.ylabel('Values')
plt.title('Bar Chart with Custom Labels')
plt.show()

Customizing Bar Chart Appearance

You can customize colors, width, and other properties ?

import matplotlib.pyplot as plt

# Sample data
months = ['Jan', 'Feb', 'Mar', 'Apr', 'May']
sales = [120, 150, 180, 90, 200]

# Create customized bar chart
plt.figure(figsize=(8, 5))
bars = plt.bar(months, sales, 
               color=['red', 'blue', 'green', 'orange', 'purple'],
               width=0.6,
               edgecolor='black',
               linewidth=1)

# Add value labels on bars
for bar, value in zip(bars, sales):
    plt.text(bar.get_x() + bar.get_width()/2, bar.get_height() + 5,
             str(value), ha='center', va='bottom')

plt.xlabel('Months')
plt.ylabel('Sales')
plt.title('Monthly Sales Bar Chart')
plt.grid(axis='y', alpha=0.3)
plt.show()

Key Parameters

Conclusion

Use plt.bar() to create bar charts from lists. Customize with colors, labels, and styling for better visualization. Always add axis labels and titles for clarity.