Handling Missing Values
Missing Values
Reasons for missing values
- Information is not collected (age of a person)
- Attributes may be not applicable to all cases (income of a child)
Handling
- radical
- eliminate the variable (column)
- eliminate the object (row)
- fix
- use some constant to fill in the missing values
- estimate
- replace with the Mean value
- predict - build some Machine Learning model to predict missing values
Sources
- Data Mining (UFRT)
- http://www.developerzen.com/2009/08/14/data-mining-handling-missing-values-the-database/