Warn If a Variable Already Exists

Warn if a variable already exists inside a dataset

Usage

warn_if_vars_exist(dataset, vars)

Arguments

dataset

A data.frame

Default value

none

vars

character vector of columns to check for in dataset

Default value

none

Value

No return value, called for side effects

See also

Function that provide users with custom warnings suppress_warning(), warn_if_incomplete_dtc(), warn_if_inconsistent_list(), warn_if_invalid_dtc()

Examples

library(dplyr, warn.conflicts = FALSE)
dm <- tribble(
  ~USUBJID,           ~ARM,
  "01-701-1015", "Placebo",
  "01-701-1016", "Placebo",
)

## No warning as `AAGE` doesn't exist in `dm`
warn_if_vars_exist(dm, "AAGE")

## Issues a warning
warn_if_vars_exist(dm, "ARM")
#> Warning: Variable "ARM" already exists in the dataset.