df_add_delta: Add delta columns to a data.frame.

In Deleetdk/kirkegaard: kirkegaard

Add delta columns to a data.frame.

Description

Adds delta (difference) columns to a data.frame. These are made from one primary variable and a number of secondary variables. Variables can be given either by indices or by name. If no secondary variables are given, all numeric variables are used.

Usage

df_add_delta(
  df,
  primary_var,
  secondary_vars = NULL,
  prefix = "delta",
  sep = "_",
  subtract_from_primary = T,
  standardize = F
)

Arguments

df	(data.frame) A data.frame.
primary_var	(character or numeric vector) The primary variable to use.
secondary_vars	(character or numeric vector) Which secondary variables to use. Defaults to all non-primary variables.
prefix	(character) The prefix to use on the new variables. Default="delta".
sep	(character) The separator to use for the new variables. Default="_".
subtract_from_primary	(boolean) Whether to subtract from the primary variable. Defaults to T. If F, then the primary will be subtracted from the secondaries.
standardize	(boolean) Whether to standardize the difference scores. Defaults to F.

Examples

#add delta variables to iris between Sepal.Length and Sepal.Width
head(df_add_delta(iris, primary_var = 1, secondary_vars = 2))
#add delta variables to iris between Sepal.Length and all other numerical variables
head(df_add_delta(iris, primary_var = 1))

Deleetdk/kirkegaard documentation built on May 8, 2024, 12:27 a.m.