当使用命名向量指定列时,dplyr 0.7.5中的select()从dplyr 0.7.4返回不同的结果.
library(dplyr)
df <- data.frame(a = 1:5, b = 6:10, c = 11:15)
print(df)
#> a b c
#> 1 1 6 11
#> 2 2 7 12
#> 3 3 8 13
#> 4 4 9 14
#> 5 5 10 15
# a named vector
cols <- c(x = 'a', y = 'b', z = 'c')
print(cols)
#> x y z
#> "a" "b" "c"
# with dplyr 0.7.4
# returns column names with vector values …