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R Package Development

Jay Lee

2019/03/18

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Motivation

library(ggplot2)
ggplot(data = mtcars) +
    geom_bar(aes(x = factor(cyl), fill = factor(gear)))

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Code/Function Reuse

  • Copy and paste from existinig code snippets

  • source("path/to/commonly/used/functions.R")

  • .Rprofile

  • library(my_awesome_pkg)

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Cheet Sheet

  • Create an R package Project from RStudio

  • Change project options to use roxygen2

  • Delete R/hello.R, man/hello.Rd, and (default) NAMESPACE

  • Iterate through: write/load/document/check/install

  • Build source and share

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R Package Development Screenshots

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Create a new R project

project

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New Directory

directory

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New R Package

pkg

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Naming is hard but fun!

pkg

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Naming is hard but fun!

pkg

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Hello World!

pkg

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Bye World!

pkg

12 / 49

Bye World!

pkg

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Bye World!

pkg

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Bye World!

pkg

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Bye (Default) NAMESPACE!

pkg

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Bye (Default) NAMESPACE!

pkg

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Change Project Options

pkg

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Check Roxygen

pkg

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Roxygen Option Not Available?

  • install.packages("roxygen2")

  • Save and restart RStudio Project (optional)

  • Return to Project Option

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Check Roxygen

pkg

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Check Roxygen

pkg

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Write R Functions

pkg

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Write R Functions

pkg

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Load All Functions (cmd-shift-L)

pkg

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Load All Functions (cmd-shift-L)

pkg

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Load All Not Available?

  • install.packages("devtools")

  • Save and restart RStudio Project

  • Return to Build menu

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Document

pkg

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Document

pkg

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Generate Documents (cmd-shift-D)

pkg

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Generate Documents (cmd-shift-D)

pkg

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Check (cmd-shift-E)

pkg

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Check Progress

pkg

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Check Warnings

pkg

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Check Warning Fixed

pkg

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Nitpicky Warnings/Notes

  • Title Case

  • Description period.

  • Fix license

  • Etc.

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Check Warning Fixed

pkg

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Install and Restart (cmd-shift-B)

pkg

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Build Source

pkg

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Build Source

pkg

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Share with coworkers

  • Copy zipped source file to a common location

  • install.packages("path/to/source", repos = NULL)

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Share with Strangers

pkg

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Git Set!

pkg

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Git Pane

pkg

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Create Github Repo

repo

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Initiate Github Repo

init

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First Commit!

pkg

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devtools::install_github

library(devtools)
devtools::install_github("joongsup/demor")
library(demor)
demor_ht(mtcars)
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Thanks!

49 / 49

Motivation

library(ggplot2)
ggplot(data = mtcars) +
    geom_bar(aes(x = factor(cyl), fill = factor(gear)))

2 / 49
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