try 从数据框列中的向量替换值时如何避免回收

这个问题是在研究这个问题时出现的.

I have this manipulated iris dataset with two vectors:个

new_name <- c("new_setoas", "new_virginica")
to_select <- c("setosa", "virginica")
iris %>% 
  group_by(Species) %>% 
  slice(1:2) %>% 
  mutate(Species = as.character(Species))

  Sepal.Length Sepal.Width Petal.Length Petal.Width Species   
         <dbl>       <dbl>        <dbl>       <dbl> <chr>     
1          5.1         3.5          1.4         0.2 setosa    
2          4.9         3            1.4         0.2 setosa    
3          7           3.2          4.7         1.4 versicolor
4          6.4         3.2          4.5         1.5 versicolor
5          6.3         3.3          6           2.5 virginica 
6          5.8         2.7          5.1         1.9 virginica

我想用另一个向量(new_name)中的值替换从一个向量(to_select)中 Select 的物种中的值

When I do:个

new_name <- c("new_setoas", "new_virginica")
to_select <- c("setosa", "virginica")
iris %>% 
  group_by(Species) %>% 
  slice(1:2) %>% 
  mutate(Species = as.character(Species)) %>% 
  mutate(Species = ifelse(Species %in% to_select, new_name, Species))

# I get:

  Sepal.Length Sepal.Width Petal.Length Petal.Width Species      
         <dbl>       <dbl>        <dbl>       <dbl> <chr>        
1          5.1         3.5          1.4         0.2 new_setoas   
2          4.9         3            1.4         0.2 **new_virginica** # should be new_setoas
3          7           3.2          4.7         1.4 versicolor   
4          6.4         3.2          4.5         1.5 versicolor   
5          6.3         3.3          6           2.5 **new_setoas** # should be new_virginica   
6          5.8         2.7          5.1         1.9 new_virginica 

虽然我知道这是因为recycling.我不知道该怎么避免这件事！