[빅분기 실기 R] Factor 변수 levels 통일

> table(train$Employment.Type) Government Sector Private Sector/Self Employed 434 1056 > table(test$Employment.Type) Casual employment Government Sector 3 134 Private Sector/Self Employed 360 서로 레벨이 같지 않아 모델생성 및 예측에서 Error: `data` and `reference` should be factors with the same levels. 에러가 발생한다.

해결하고자 levels(레벨개수 적은쪽)<-levels(레벨개수 많은쪽) 해줬더니 > table(train$Employment.Type) Casual employment Government Sector 434 1056 Private Sector/Self Employed 0 > table(test$Employment.Type) Casual employment Go...