Drop uninformative columns from a data frame

This is a convenient way to drop columns which all have one value (missing or not) or if na_distinct = FALSE also drop columns which all have one value and/or missing values.

drop_uninformative_columns(data, na_distinct = TRUE)

Arguments

data

A data frame.

na_distinct

A flag specifying whether to treat missing values as distinct from other values.

Value

The original data frame with only informative columns.

Examples

data <- tibble::tibble(
  a = c(1,1,1), x = c(NA, NA, NA), b = c(1, 1, NA), 
  z = c(1, 2, 2), e = c(1, 2, NA))

drop_uninformative_columns(data)
#> # A tibble: 3 × 3
#>       b     z     e
#>   <dbl> <dbl> <dbl>
#> 1     1     1     1
#> 2     1     2     2
#> 3    NA     2    NA
drop_uninformative_columns(data, na_distinct = FALSE)
#> # A tibble: 3 × 2
#>       z     e
#>   <dbl> <dbl>
#> 1     1     1
#> 2     2     2
#> 3     2    NA