rel_var {random.cdisc.data}

Related Variables: Assign

Description

Assign values to a related variable within a domain.

Usage

rel_var(df, var_name, related_var, var_values = NULL)

Arguments

df

(data.frame)
Data frame containing the related variables.

var_name

(character)
Name of variable related to rel_var to add to df.

related_var

(character)
Name of variable within df with values to which values of var_name must relate.

var_values

(any)
Vector of values related to values of related_var.

Value

df with added factor variable var_name containing var_values corresponding to related_var.

Examples

# Example with data.frame.
params <- c("Level A", "Level B", "Level C")
adlb_df <- data.frame(
  ID = 1:9,
  PARAM = factor(
    rep(c("Level A", "Level B", "Level C"), 3),
    levels = params
  )
)
rel_var(
  df = adlb_df,
  var_name = "PARAMCD",
  var_values = c("A", "B", "C"),
  related_var = "PARAM"
)

# Example with tibble.
adlb_tbl <- tibble::tibble(
  ID = 1:9,
  PARAM = factor(
    rep(c("Level A", "Level B", "Level C"), 3),
    levels = params
  )
)
rel_var(
  df = adlb_tbl,
  var_name = "PARAMCD",
  var_values = c("A", "B", "C"),
  related_var = "PARAM"
)