R语言中对数据框的列名重命名

报错类型
Error: All arguments must be named

plyr中的rename和dplyr中的rename用法是不同的.

plyr::rename

rename(data, c(old=new))

dplyr::rename

rename(data, new = old)

Example

比如, 默认的是plyr的rename, 运行下面命令, 会报错:

d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
d
library(tidyverse)
rename(d, c("old2"="two", "old3"="three"))
rename(d, c(old2="two", old3="three"))

结果

> d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
> d
  old1 old2 old3
1    1    4    7
2    2    5    8
3    3    6    9
> library(tidyverse)
> rename(d, c("old2"="two", "old3"="three"))
Error: All arguments must be named
> rename(d, c(old2="two", old3="three"))
Error: All arguments must be named

正确的打开方式:

d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
d
rename(d, two=old2, three=old3)

结果:

> d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
> d
  old1 old2 old3
1    1    4    7
2    2    5    8
3    3    6    9
> rename(d, two=old2, three=old3)
  old1 two three
1    1   4     7
2    2   5     8
3    3   6     9

或者使用plyr按第一种方式修改:

d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
d
library(tidyverse)
plyr::rename(d, c("old2"="two", "old3"="three"))
plyr::rename(d, c(old2="two", old3="three"))

结果:

> d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
> d
  old1 old2 old3
1    1    4    7
2    2    5    8
3    3    6    9
> library(tidyverse)
> plyr::rename(d, c("old2"="two", "old3"="three"))
  old1 two three
1    1   4     7
2    2   5     8
3    3   6     9
> plyr::rename(d, c(old2="two", old3="three"))
  old1 two three
1    1   4     7
2    2   5     8
3    3   6     9

搞定!!!

关键点, dplyr是新名称放在前面, 旧名称放在后面, 而且不用引号, 不用c(), 更方便!!!

另外, dplyr中的select还可以选择+ 该名称, 直接指定列数!!!

d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
d
select(d,one=1,three=3)

结果:

> d <- data.frame(old1=1:3, old2=4:6, old3=7:9)
> d
  old1 old2 old3
1    1    4    7
2    2    5    8
3    3    6    9
> select(d,one=1,three=3)
  one three
1   1     7
2   2     8
3   3     9