目录 1. 数据探索的步骤和准备 2. 缺失值处理 为什么需要处理缺失值 Why data has missing values? 缺失值处理的技术 3. 异常值检测和处理 What is an outlier? What are the types of outliers? What are the causes of outliers? What is the impact of outliers on dataset? How to detect outlier? How to remov