correlation at the end of a pipe operation

Question

I am trying to get a correlation between two variables at the end of a pipe operation, why don't these work?

library(tidyverse)
iris %>% 
  map(~cor(.$Sepal.Length, .$Sepal.Width, use = "complete.obs"))

#or
iris %>% 
  dplyr::select(Sepal.Length, Sepal.Width) %>% 
  map2(~cor(.x, .y, use = "complete.obs"))

thanks

Answer 1

Don't forget about %$% !

library(magrittr)

iris %$% 
  cor(Sepal.Length, Sepal.Width, use = "complete.obs")
#> [1] -0.1175698

^{Created on 2021-03-02 by the reprex package (v0.3.0)}