---
# System prepended metadata

title: Categorical Feature Encoding
tags: [課程共筆]

---

###### tags: `課程共筆`
# Categorical Feature Encoding

## Q1: 用數字直接encode類別有什麼問題?
* test
   懶覺會變小嗎？


## Q2: 1-hot encoding益處是什麼?
* 類別(值)可以運算，如加總或平均等，數據前處理都用得到。

## Q3: Any other encoding methods?
Encoding Methods
* Nominal Encoding
    * One hot Encoding
    * One hot Encoding(Multiple Categories)
    * Mean Encoding
* Ordinal Encoding
    * Target guided ordinal Encoding
    * Label Encoding
> https://ai-ml-analytics.com/encoding/