column_combine: column_combine

In camkay/panoply: A Panoply of Miscellaneous Functions

column_combine

Description

Creates a composite column using only columns in a data frame that have names that match a pattern.

Usage

column_combine(
  pattern,
  data,
  fun = mean,
  verbose = FALSE,
  message = TRUE,
  invert = FALSE
)

Arguments

pattern	a character string that is used to find the columns of interest. It can be a regular expression.
data	a data frame.
fun	the function to use to create the composite column; defaults to 'mean'.
verbose	specifies whether all column names should be listed, regardless of length.
message	if TRUE, messages are generated telling the user which columns were used to create the composite.
invert	if TRUE, combines columns that DO NOT match the pattern.

Examples

x <- data.frame(my_column_x  = 1:10,
                my_column_x2 = 1:10 * rnorm(10, mean = 1),
                my_column_x3 = 1:10 * rnorm(10, mean = 1),
                my_column_y  = 11:20,
                my_column_y2 = 11:20 * rnorm(10, mean = 1),
                my_column_y3 = 11:20 * rnorm(10, mean = 1))

column_combine(pattern = "x", data = x)
column_combine(pattern = "_y", data = x)
column_combine(pattern = "my_column", data = x)

camkay/panoply documentation built on Jan. 17, 2025, 6:31 a.m.