arrange column alphabetically tidyverse R

I have:

df = data.frame(col1 = c("A","b","B","C","c"))

I want:

But when I try using arrange and tidyverse, I get:

> df %>% arrange(col1)
  col1
1    A
2    B
3    C
4    b
5    c

>Solution :

You can use:

library(dplyr)

data.frame(col1 = c("A","b","B","C","c")) %>% 
  arrange(tolower(col1), col1)
#>   col1
#> 1    A
#> 2    B
#> 3    b
#> 4    C
#> 5    c