问题描述
解析xml文件后,我的数据看起来像这样:
example_df <-
tibble(id = "ABC",wage_type = "salary",name = c("Description","Code","Base","Description","Code"),value = c("wage_element_1","51B","600","wage_element_2","51C","740","wage_element_3","51D"))
example_df
# A tibble: 8 x 4
id wage_type name value
<chr> <chr> <chr> <chr>
1 ABC salary Description wage_element_1
2 ABC salary Code 51B
3 ABC salary Base 600
4 ABC salary Description wage_element_2
5 ABC salary Code 51C
6 ABC salary Base 740
7 ABC salary Description wage_element_3
8 ABC salary Code 51D
具有大约1000个不同的id
,并且每个都有wage_type
的三个可能值。
我想将name
列中的值更改为列。
我尝试使用pivot
,但是我在努力处理最终的list-cols
:由于并非所有salary
都具有Base
,因此最终的列表字段的大小与下方:
example_df <- example_df %>%
pivot_wider(id_cols = c(id,wage_type),names_from = name,values_from = value)
example_df
# A tibble: 1 x 5
id wage_type Description Code Base
<chr> <chr> <list> <list> <list>
1 ABC salary <chr [3]> <chr [3]> <chr [2]>
因此,当我尝试取消对cols的嵌套时,会引发错误:
example_df%>%
unnest(cols = c(Description,Code,Base))
Error: Can't recycle `Description` (size 3) to match `Base` (size 2).
我知道这是因为tidyr函数不会回收,但是我找不到解决此问题的方法或base r
解决方案。我试图与
根据{{3}}的unlist(strsplit(as.character(x))
解决方案,但也遇到了列长度问题。
所需的输出如下:
desired_df <-
tibble(
id=c("ABC","ABC","ABC"),wage_type=c("salary","salary","salary"),Description = c("wage_element_1","wage_element_3"),Code = c("51B","51D"),Base = c("600",NA))
desired_df
id wage_type Description Code Base
<chr> <chr> <chr> <chr> <chr>
1 ABC salary wage_element_1 51B 600
2 ABC salary wage_element_2 51C 740
3 ABC salary wage_element_3 51D NA
我希望您能使用tidyr解决方案,但任何帮助将不胜感激。谢谢。
解决方法
我建议使用tidyverse
函数的这种方法。您遇到的问题是由于函数如何管理不同的行。因此,通过创建一个id2
这样的id变量,您可以避免在最终重塑的数据中使用列表输出:
library(tidyverse)
#Code
example_df %>%
arrange(name) %>%
group_by(id,wage_type,name) %>%
mutate(id2=1:n()) %>% ungroup() %>%
pivot_wider(names_from = name,values_from=value) %>%
select(-id2)
输出:
# A tibble: 3 x 5
id wage_type Base Code Description
<chr> <chr> <chr> <chr> <chr>
1 ABC salary 600 51B wage_element_1
2 ABC salary 740 51C wage_element_2
3 ABC salary NA 51D wage_element_3