r - How to select non-numeric columns using dplyr::select_if

I need to select all columns that are not numeric. I can select all numeric columns easily using select_if:

mtcars %>% select_if(is.numeric)

What if I want to select non-numeric columns? I tried:

mtcars %>% select_if(!is.numeric)

But I got error message below:

Error in !is.numeric : invalid argument type

Thanks a lot for help!

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Best Answer-推荐答案

You can use purrr's negate() which is included if you use library(tidyverse) rather than just library(dplyr)

library(tidyverse)
iris %>% select_if(negate(is.numeric))

[dbther]