R-ifelse（）中的is.na（）

Question

I am trying to create a new variable child_or_adult in my data set titanic , by using mutate() . The new variable would specify the age group of each person. However, the variable age contains NA s values, which I don't want to ignore. Instead, I want to classify them as adult . How could I do this by using is.na() within the ifeslse() statement ?

titanic %>% 
  mutate(child_or_adult = ifelse(test = age <= 9, 
                                 yes = "child", 
                                 no = "adult", 
                                 is.na(age) <- "adult"
                                 ))

Answer 1

尝试这样做：

 titanic %>% mutate(child_or_adult = ifelse(age <= 9 | !is.na(age),"child","adult"))