df_apply: df_apply

In adamddh/ds303pkg: Package for Data-303 submission at Calvin University

df_apply

Description

Apply a function to qualifying columns in a data frame, a different function otherwise

Usage

df_apply(.data, .f, .condition = is.numeric, .else = identity, ...)

Arguments

.data	Data frame containing columns to apply functions to
.f	Function to apply to columns that fit .condition()
.condition	Condition to check to apply .f()
.else	Function to apply to columns that do NOT fit .condition()
...	Additional arguments to be passed to .f()

Value

A Data frame with the columns changed as specified.

Examples

n <- 7L
test_data <-
  dplyr::tibble(
    double     = rnorm(n, 100, 10),
    integer    = (1L:n) * (1L:n),
    character  = LETTERS[1L:n],
    factor     = factor(letters[1L:n]),
    logical    = rep(c(TRUE, FALSE), length.out = n)
  )
test_data
df_apply(test_data, round, digits = -1)
test_data |> df_apply(mean, is.numeric)
test_data |> df_apply(tolower, is.character)
test_data |> df_apply(round, is.numeric, as.factor, digits = -1)

adamddh/ds303pkg documentation built on April 14, 2022, 9:42 a.m.