Understanding axis=0 in Pandas: A Complete Guide

What Does axis=0 Mean?

In pandas, the axis parameter specifies the direction of an operation:

• axis=0: Operates down the rows (column-wise).
• axis=1: Operates across the columns (row-wise).

When you use axis=0, the operation is applied along the rows, meaning it processes each column independently. 

Key Concept of axis=0

• axis=0 refers to rows.
• Operations are applied column-wise (i.e., across all rows in each column).

Key Takeaways

1. axis=0: Operates down the rows (column-wise).
2. axis=1: Operates across the columns (row-wise).
3. Use axis=0 for column-wise operations like summing, applying functions, or dropping rows.