It can be helpful when writing other functions to just return the names of the variables that contain missing values. miss_var_which returns a vector of variable names that contain missings. It will return NULL when there are no missings.

miss_var_which(data)

Arguments

data

a data.frame

Value

character vector of variable names

Examples

miss_var_which(airquality)
#> [1] "Ozone" "Solar.R"
miss_var_which(iris)
#> NULL