a technique to standardize the independent features present in the data in a fixed range
performed during the data pre-processing.
방법들
1) Min Max Scaler
2) Standard Scaler
3) Max Abs Scaler
4) Robust Scaler
5) Quantile Transformer Scaler
6) Power Transformer Scaler
7) Unit Vector Scaler
출처:https://towardsdatascience.com/all-about-feature-scaling-bcc0ad75cb35