[변수 처리] Python에서 범주형 변수(Categorical) 다루기

http://contrib.scikit-learn.org/categorical-encoding/onehot.html One Hot — Category Encoders latest documentation options are ‘error’, ‘return_nan’, ‘value’, and ‘indicator’. The default is ‘value’. Warning: if indicator is used, an extra column will be added in if the transform matrix has unknown categories. This can cause unexpected changes in dimension in some case contrib.scikit-learn.org ##..

2019.09.13