###### 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/