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title: Pandas
created_date: 2025-07-21
updated_date: 2025-07-21
aliases:
tags:
---
# Pandas

## Stack, Unstack
Unstack converts a multi index into a column index
Stack converts a multi column into a multi index
## Melting and Pivoting

They are very specific --> you can do stack and unstack to achieve the same result

## get_dummies()

You can get categorical data (sex: male / female) into 2 columns: sex_Male (0 / 1), sex_Female (0/ 1)