# ML crash course - Categorical data

> Machine learning crash course 중 Categorical data 챕터

[Machine learning crash course](https://wiki.g15e.com/pages/Machine%20learning%20crash%20course.txt) 중 [Categorical data](https://wiki.g15e.com/pages/Categorical%20data.txt) 챕터

https://developers.google.com/machine-learning/crash-course/categorical-data

## Introduction

### Numbers can also be categorical data

### Encoding

## Vocabulary and one-hot encoding

### Index numbers

### One-hot encoding

### Outliers in categorical data

### Encoding high-dimensional categorical features

## Common issues

### Human raters

### Machine raters

### High dimensionality

## Feature crosses

### When to use feature crosses

## Feature cross exercises

https://developers.google.com/machine-learning/crash-course/categorical-data/feature-cross-exercises

## What's next

- [ML crash course - Datasets, generalization, and overfitting](https://wiki.g15e.com/pages/ML%20crash%20course%20-%20Datasets,%20generalization,%20and%20overfitting.txt)