#加载数据集data(airquality)#查看数据集str(airquality)head(airquality)查看NAcolSums(is.na(airquality))去除NAairquality_no_na<-na.omit(airquality)再次checkNAcolSums(is.na(airquality_no_na))查看duplicatesduplicated_rows<-duplicated(airqua