1. The role of data preprocessing
- An important link in the data analysis process
- Directly determines the quality and value output of all data work in the later period
- Plays a decisive role in the final results of the model
2. The main content of data preprocessing
- Data cleaning
- Data conversion
- Data dimensionality reduction
- Sample imbalance
- Data sampling
- Collinearity problem
- Correlation
- standardization
- Discretization
- Unstructured data