Case_when 函数将列中的新变量保存到现有 df

Question

我正在使用 case_when 函数对现有变量进行重新分类，该变量允许最多 6 个种族选择。根据确定的逻辑，我将这些种族重新分类到一个新变量（new_racecat）中，该变量仅显示一个种族选择。我已经粘贴了代码的第一部分，语法有效并且代码完全运行。我遇到的问题是，当我查看 df (View(Racedata) 时，这个新变量没有出现。如何将此新变量保存到现有数据框中的新列中？

Racedata %>% 
  separate(col = "Race", into = c("race1", "race2", "race3", "race4", "race5", "race6"), sep = ";") %>% 
             mutate(new_racecat = case_when(race1 == "Native Hawaiian (Including Part-Hawaiian)" | 
                                           race2 == "Native Hawaiian (Including Part-Hawaiian)" | 
                                           race3 == "Native Hawaiian (Including Part-Hawaiian)" | 
                                           race4 == "Native Hawaiian (Including Part-Hawaiian)" |
                                           race5 == "Native Hawaiian (Including Part-Hawaiian)" | 
                                           race6 == "Native Hawaiian (Including Part-Hawaiian)" ~ "Native Hawaiian",

Answer 1

管道操作员（

%>%

）仅将您的

Racedata

输入到操作中。它不会保存它。您可以像 @RonakShah 评论的那样执行此操作，但您可以加载

magrittr

并在每次进行管道传输时使用

%<>%

而不是

%>%

，以便保存输出。