我有一个数据框,大部分是每行一个观察。但是,某些行具有多个值:
# A tibble: 3 x 2
`number` abilities
<dbl> <chr>
1 51 b1261
2 57 d710
3 57 b1301; d550
structure(list(`number` = c(51, 57, 57), abilities = c("b1261",
"d710", "b1301; d550")), .Names = c("number", "abilities"
), row.names = c(NA, -3L), class = c("tbl_df", "tbl", "data.frame"
))
我想得到以下内容:
# A tibble: 3 x 2
`number` abilities
<dbl> <chr>
1 51 b1261
2 57 d710
3 57 d550
4 57 b1301
直截了当地分开了;但我不确定如何轻松添加新行,尤其是当能力可能包含2个以上的值时。
这与:R semicolon delimited a column into rows非常相似,但不需要删除重复项
答案 0 :(得分:17)
separate_rows
中的tidyr
功能可以做到这一点:
library(tidyr)
## The ";\\s+" means that the separator is a ";" followed by one or more spaces
separate_rows(df,abilities,sep=";\\s+")
number abilities
<dbl> <chr>
1 51 b1261
2 57 d710
3 57 b1301
4 57 d550
答案 1 :(得分:4)
dplyr
对此有好处,因为它有unnest
:
library(tidyverse)
library(stringr)
df %>%
mutate(unpacked = str_split(abilities, ";")) %>%
unnest %>%
mutate(abilities = str_trim(unpacked))
答案 2 :(得分:1)
另一个选项是cSplit
library(splitstackshape)
cSplit(df1, 'abilities', '; ', 'long')
# number abilities
#1: 51 b1261
#2: 57 d710
#3: 57 b1301
#4: 57 d550