5. Data Formatting
저자: Profesor Magallanes

1. Formatting
1.1. Text
1.1.1. mixture of capitalization
1.2. Numbers
1.2.1. coerce?
1.2.2. ignore?
1.2.3. raise?
1.3. Date
1.4. Categories
1.4.1. Use levels correctly
1.4.2. Verify range of ordinal levels