In richierocks/countess: Helpers for "dplyr"'s "count" Function

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

`countess`: Helpers for `dplyr`'s `count()` Function

Convenience functions built on top of dplyr to count the number of instances of each value in columns of data frames.

count_all() is group_by_all() plus tally().
count_at() is group_by_at() plus tally().
count_if() is group_by_if() plus tally().

Installation

You can install this development version of countess using

# install.packages("remotes")
remotes::install_github("richierocks/countess")

Example

This is a basic example which shows you how to solve a common problem:

suppressPackageStartupMessages(library(dplyr))
set.seed(19790801)

library(dplyr)
library(countess)
n <- 100
quarks <- data_frame(
  first_gen = sample(c("up", "down"), n, replace = TRUE),
  second_gen = sample(c("charm", "strange"), n, replace = TRUE),
  third_gen = factor(sample(c("top", "bottom"), n, replace = TRUE))
)
quarks %>% count_all()
quarks %>% count_at(vars(contains("ir")))
quarks %>% count_if(is.factor)