treat_string_as_col: treat_string_as_col
In MilesMcBain/rlung: A Friendly Interface to Tidyeval

Description Usage Arguments Details Value Examples

Take the a string value and use it as a column name in a dplyr function.

1	treat_string_as_col(arg)

arg

the argument that holds a value to be used as a column name.

This is used to take the string value of a variable and use it in place of a literal column name when calling a dplyr function. This ability is useful when the name of the column to operate on is determined at run-time from data.

something that will resolve to a column name when prefixed with '!!'.

## Not run: 
## drop this run-time determined column.
b <- "cyl"
 select(mtcars, -!!treat_string_as_col(b))

## function double a column
double_col <- function(dat, arg) {
  dplyr::mutate(dat, result = !!rlang::sym(arg) * 2)
}
double_col(mtcars, arg = 'cyl')


## End(Not run)