# airquality NA outlier 처리 # 1. NA outlier 확인 # NA - Ozone Solar.R # 이상치 - Ozone Wind summary(airquality) sum(is.na(airquality)) boxplot(airquality) # 2. NA 처리 median(airquality$Ozone) # NA ??????? 31.5 fivenum(airquality$Ozone) median(airquality$Solar.R) # NA ????? 205.0 airquality.clean
