Data Cleaning and Preparation in R

Recoding Categorical Variables

Code Example 3

30-45 minutes Applied Step 9 of 10

Code

Code Example 3

9 / 10

Code

Code Example 3

enrollment_recoded <- enrollment_data |>
  mutate(
    visit_status_clean = case_when(
      str_to_lower(visit_status) %in% c("complete", "completed", "done") ~ "Completed",
      str_to_lower(visit_status) %in% c("missed", "not done", "not completed") ~ "Missed",
      str_to_lower(visit_status) %in% c("pending", "awaiting") ~ "Pending",
      is.na(visit_status) ~ NA_character_,
      TRUE ~ "Needs review"
    )
  )