In krzjoa/looplyr: Loop Verbs and Operators

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.path = "man/figures/README-",
  out.width = "100%"
)

looplyr

Loop Verbs For Grammar of Data Manipulation

Installation

# install.packages("devtools")
devtools::install_github("krzjoa/looplyr")

Example

looplyr provides easy-to-use shortcuts to apply mutate/summarise in loop and and loop operator to process multiple data.frame-like objects using one dplyr/magrittr pipe wrapped with curly brackets.

`loop_mutate`

suppressMessages(library(dplyr))
suppressMessages(library(glue))
library(looplyr)

cars %>%
   loop_mutate(
     2:4, paste0("speed.", .x) := speed ** .x
   ) %>%
   head(5)

`loop_summarise`

quantiles <- c(0.25, 0.50, 0.75)
iris %>%
  group_by(Species) %>%
  loop_summarise(
     quantiles,
     glue("Petal.Length.{.x}") := quantile(Petal.Length, .x),
     glue("Petal.Width.{.x}") := quantile(Petal.Width, .x)
   )