Reorder Two Columns Levels Simultaneously

Reorder Two Columns Levels Simultaneously

Usage

co_relevels(df, primary, secondary, levels_primary)

Arguments

df

(data.frame) with two column whose factors should be reordered.

primary

(string) the name of the column on which the levels reordering should be based.

secondary

(string) the name of the column whose levels should be reordered following the levels of the primary column.

levels_primary

(character) the levels in the desired order. Existing levels that are not included will be placed afterward in their current order.

Details

The function expect a 1:1 matching between the elements of the two selected column.

Examples

df <- data.frame(
  SUBJID = 1:3,
  PARAMCD = factor(c("A", "B", "C")),
  PARAM = factor(paste("letter", LETTERS[1:3]))
)
co_relevels(df, "PARAMCD", "PARAM", levels_primary = c("C", "A", "B"))
#>   SUBJID PARAMCD    PARAM
#> 1      1       A letter A
#> 2      2       B letter B
#> 3      3       C letter C