Reorder Two Columns Levels Simultaneously — co_relevels • dunlin

Reorder Two Columns Levels Simultaneously

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