cut_by_group: Cutting data by group

In dunlin: Preprocessing Tools for Clinical Trial Data

Cutting data by group

Description

Cutting data by group

Usage

cut_by_group(df, col_data, col_group, group, cat_col)

Arguments

df	(dataframe) with a column of data to be cut and a column specifying the group of each observation.
col_data	(character) the column containing the data to be cut.
col_group	(character) the column containing the names of the groups according to which the data should be split.
group	(⁠nested list⁠) providing for each parameter value that should be analyzed in a categorical way: the name of the parameter (character), a series of breakpoints (numeric) where the first breakpoints is typically -Inf and the last Inf, and a series of name which will describe each category (character).
cat_col	(character) the name of the new column in which the cut label should he stored.

Details

Function used to categorize numeric data stored in long format depending on their group. Intervals are closed on the right (and open on the left).

Value

data.frame with a column containing categorical values.

Examples

group <- list(
  list(
    "Height",
    c(-Inf, 150, 170, Inf),
    c("=<150", "150-170", ">170")
  ),
  list(
    "Weight",
    c(-Inf, 65, Inf),
    c("=<65", ">65")
  ),
  list(
    "Age",
    c(-Inf, 31, Inf),
    c("=<31", ">31")
  ),
  list(
    "PreCondition",
    c(-Inf, 1, Inf),
    c("=<1", "<1")
  )
)
data <- data.frame(
  SUBJECT = rep(letters[1:10], 4),
  PARAM = rep(c("Height", "Weight", "Age", "other"), each = 10),
  AVAL = c(rnorm(10, 165, 15), rnorm(10, 65, 5), runif(10, 18, 65), rnorm(10, 0, 1)),
  index = 1:40
)

cut_by_group(data, "AVAL", "PARAM", group, "my_new_categories")

dunlin documentation built on Oct. 31, 2024, 5:07 p.m.