使用r

Question

starwars %>% mutate (new_column =  "Other", .before = 1)

# A tibble: 87 × 16
   name               height  mass hair_color    skin_color  eye_color birth_year sex    gender    homeworld species films     vehicles  starships ICP_type .before
   <chr>               <int> <dbl> <chr>         <chr>       <chr>          <dbl> <chr>  <chr>     <chr>     <chr>   <list>    <list>    <list>    <chr>      <dbl>
 1 Luke Skywalker        172    77 blond         fair        blue            19   male   masculine Tatooine  Human   <chr [5]> <chr [2]> <chr [2]> Other          1
 2 C-3PO                 167    75 NA            gold        yellow         112   none   masculine Tatooine  Droid   <chr [6]> <chr [0]> <chr [0]> Other          1
 3 R2-D2                  96    32 NA            white, blue red             33   none   masculine Naboo     Droid   <chr [7]> <chr [0]> <chr [0]> Other          1

它创建了一个“ .before”列，而不是在第一列之前添加新列。

i我尝试了add_column（），它可以正常运行。但是我仍然想知道为什么会出错。谢谢！

您可以尝试使用突变，然后重新安置以指定位置：

Answer 1

dplyr中的每个完整功能请求：

https：//github.com/tidyverse/dplyr/issues/2047

Answer 2

.before和.after

都应该工作。 toblowing是我的R实例中的结果，该版本在此处发布时在4.4.0处为4.4.0：

> dplyr::starwars |> dplyr::mutate(new_column =  "Other", .before = 1)
# A tibble: 87 × 15
   new_column name        height  mass hair_color skin_color eye_color birth_year sex   gender homeworld species films vehicles
   <chr>      <chr>        <int> <dbl> <chr>      <chr>      <chr>          <dbl> <chr> <chr>  <chr>     <chr>   <lis> <list>  
 1 Other      Luke Skywa…    172    77 blond      fair       blue            19   male  mascu… Tatooine  Human   <chr> <chr>   
 2 Other      C-3PO          167    75 NA         gold       yellow         112   none  mascu… Tatooine  Droid   <chr> <chr>   
 3 Other      R2-D2           96    32 NA         white, bl… red             33   none  mascu… Naboo     Droid   <chr> <chr>   
 4 Other      Darth Vader    202   136 none       white      yellow          41.9 male  mascu… Tatooine  Human   <chr> <chr>   
 5 Other      Leia Organa    150    49 brown      light      brown           19   fema… femin… Alderaan  Human   <chr> <chr>   
 6 Other      Owen Lars      178   120 brown, gr… light      blue            52   male  mascu… Tatooine  Human   <chr> <chr>   
 7 Other      Beru White…    165    75 brown      light      blue            47   fema… femin… Tatooine  Human   <chr> <chr>   
 8 Other      R5-D4           97    32 NA         white, red red             NA   none  mascu… Tatooine  Droid   <chr> <chr>   
 9 Other      Biggs Dark…    183    84 black      light      brown           24   male  mascu… Tatooine  Human   <chr> <chr>   
10 Other      Obi-Wan Ke…    182    77 auburn, w… fair       blue-gray       57   male  mascu… Stewjon   Human   <chr> <chr>   
# ℹ 77 more rows
# ℹ 1 more variable: starships <list>
# ℹ Use `print(n = ...)` to see more rows