splitted_transmute: splitted_transmute

In MarcellGranat/granatlib: Marcell's Personal R Package

splitted_transmute

Description

Splits the data.frame into separeta parts and evaluates it one-by-one. Useful for saving memmory during large computations.

Usage

splitted_transmute(
  .data,
  ...,
  split_number = 100,
  .keep = NULL,
  .progress = TRUE
)

Arguments

.data	Data frame.
...	arguments to pass transmute(...).
split_number	Number of parts to split the data.frame before evaluation.
.keep	Variables to keep after eval the expression. All newly created columns are keept automaticly.

Examples

iris_samples <- tibble(data = replicate(100, sample_n(iris, 50), simplify = FALSE))

iris_samples

iris_samples %>%
 splitted_transmute(
   fit = map(data, lm, formula = Sepal.Length ~ Sepal.Width),
   coefs = map(fit, "coefficients"),
   coef1 = map_dbl(coefs, 1),
   coef2 = map_dbl(coefs, 2),
   .keep = c("coef1", "coef2") # single core
 )

MarcellGranat/granatlib documentation built on July 9, 2023, 6:08 a.m.