Error in select(., cyl, mpg) : unused arguments (cyl, mpg)
目录
Error in select(., cyl, mpg) : unused arguments (cyl, mpg)
问题:
#由于来自MASS包的select()函数与来自dplyr包的select()函数冲突,因此会发生错误。
library(dplyr)
library(MASS)
#find average mpg grouped by 'cyl'
mtcars %>%
select(cyl, mpg) %>%
group_by(cyl) %>%
summarise(avg_mpg = mean(mpg))
解决:
#指定使用那个包的select函数就好了
library(dplyr)
library(MASS)
#find average mpg grouped by 'cyl'
mtcars %>%
dplyr::select(cyl, mpg) %>%
group_by(cyl) %>%
summarise(avg_mpg = mean(mpg))
完整错误:
> library(dplyr)
> library(MASS)
>
> #find average mpg grouped by 'cyl'
> mtcars %>%
+ select(cyl, mpg) %>%
+ group_by(cyl) %>%
+ summarise(avg_mpg = mean(mpg))
Error in select(., cyl, mpg) : unused arguments (cyl, mpg)
>