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npx skills add pluginagentmarketplace/custom-plugin-python --skill pandas-data-analysis
Master data manipulation, analysis, and visualization with Pandas, NumPy, and Matplotlib
npx skills add pluginagentmarketplace/custom-plugin-python --skill pandas-data-analysis
Master data analysis with Pandas, the powerful Python library for data manipulation and analysis. Learn to clean, transform, analyze, and visualize data effectively.
Code Example:
Code Example:
Code Example:
Code Example:
Analyze customer purchase behavior and segmentation.
Requirements:
Key Skills: Data cleaning, aggregation, visualization
Analyze sales trends and forecast future performance.
Requirements:
Key Skills: Time series operations, rolling windows, plotting
Build automated data quality assessment tool.
Requirements:
Key Skills: Data validation, statistical analysis, reporting
After mastering Pandas, explore:
import pandas as pd
# Load data with missing values
df = pd.read_csv('sales_data.csv')
# Handle missing values
df['price'].fillna(df['price'].median(), inplace=True)
df['category'].fillna('Unknown', inplace=True)
df.dropna(subset=['customer_id'], inplace=True)
# Clean text data
df['product_name'] = df['product_name'].str.strip().str.lower()
df['product_name'] = df['product_name'].str.replace('[^a-zA-Z0-9 ]', '', regex=True)
# Convert dates
df['order_date'] = pd.to_datetime(df['order_date'])
df['year'] = df['order_date'].dt.year
df['month'] = df['order_date'].dt.month
# Remove duplicates
df.drop_duplicates(subset=['order_id'], keep='first', inplace=True)
# Apply custom function
def categorize_price(price):
if price < 50:
return 'Low'
elif price < 100:
return 'Medium'
else:
return 'High'
df['price_category'] = df['price'].apply(categorize_price)import pandas as pd
# Sample sales data
df = pd.read_csv('sales.csv')
# GroupBy aggregation
dept_stats = df.groupby('department').agg({
'salary': ['mean', 'min', 'max'],
'employee_id': 'count'
})
# Multiple groupby
sales_by_region_product = df.groupby(['region', 'product_category'])['sales'].sum()
# Pivot table
pivot = df.pivot_table(
values='sales',
index='product_category',
columns='quarter',
aggfunc='sum',
fill_value=0
)
# Rolling window (moving average)
df['sales_ma_7d'] = df.groupby('product_id')['sales'].transform(
lambda x: x.rolling(window=7, min_periods=1).mean()
)
# Cumulative sum
df['cumulative_sales'] = df.groupby('product_id')['sales'].cumsum()import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns
# Set style
sns.set_style('whitegrid')
# Load data
df = pd.read_csv('sales_data.csv')
# 1. Line plot - Sales trend over time
df.groupby('month')['sales'].sum().plot(kind='line', figsize=(10, 6))
plt.title('Monthly Sales Trend')
plt.xlabel('Month')
plt.ylabel('Total Sales ($)')
plt.show()
# 2. Bar plot - Sales by category
category_sales = df.groupby('category')['sales'].sum().sort_values(ascending=False)
category_sales.plot(kind='bar', figsize=(10, 6))
plt.title('Sales by Category')
plt.xlabel('Category')
plt.ylabel('Total Sales ($)')
plt.xticks(rotation=45)
plt.show()
# 3. Histogram - Price distribution
df['price'].hist(bins=30, figsize=(10, 6))
plt.title('Price Distribution')
plt.xlabel('Price ($)')
plt.ylabel('Frequency')
plt.show()
# 4. Box plot - Salary by department
df.boxplot(column='salary', by='department', figsize=(10, 6))
plt.title('Salary Distribution by Department')
plt.suptitle('')
plt.show()
# 5. Heatmap - Correlation matrix
corr = df[['age', 'salary', 'years_experience']].corr()
sns.heatmap(corr, annot=True, cmap='coolwarm', center=0)
plt.title('Correlation Matrix')
plt.show()