README.md

In davidklaing/peek: Inspect Your Pipe Chains

peek

peek is a tiny R package with just two functions — pview() and pprint() — which are for viewing the state of a chain of piped commands without otherwise altering the chain's behavior. I use it to help myself debug and refactor my tidyverse code.

Installation

devtools::install_github("davidklaing/peek")

Example

Say you've written a long chain of piped commands, like the one below:

library(dplyr)

mtcars %>% 
  filter(carb != 8) %>% 
  select(carb, mpg, cyl, hp, drat) %>% 
  group_by(carb) %>% 
  summarise(min_mpg = min(mpg)) %>%
  mutate(min_mpg_100 = min_mpg*100)

To invoke RStudio's data viewer and see what's being passed from summarise() to mutate() without changing anything about your chain's behavior, insert pview() %>% after the call to summarise(), like so:

library(dplyr)
library(peek)

mtcars %>% 
  filter(carb != 8) %>% 
  select(carb, mpg, cyl, hp, drat) %>% 
  group_by(carb) %>% 
  summarise(min_mpg = min(mpg)) %>%
  pview() %>%
  mutate(min_mpg_100 = min_mpg*100)

If you would rather print() the object than View() it, use pprint().

davidklaing/peek documentation built on May 17, 2019, 3:14 a.m.