You are the walrus
Getting a column name like `median(perc_electric_access, na.rm = TRUE)` in the previous lesson can be pretty difficult to work with as a programmer. In this exercise, you'll use the walrus operator (:=) and other rlang magic with dplyr to specify the name of that column instead.
Latihan ini adalah bagian dari kursus
Programming with dplyr
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
# Finish the function definition
grouped_median_for_column <- function(.data, group_col, col_to_median) {
name_of_col_to_median <- ___(enquo(col_to_median))
new_col_name <- paste0("median_of_", name_of_col_to_median)
.data %>%
group_by( ___ ) %>%
summarize(___new_col_name ___ median( ___ ,
na.rm = TRUE))
}