Typography and Formatting

To the extent possible, I have tried to follow the following typographic and formatting conventions throughout the course modules.

• Software program names are written in bold italic text:

  • R
  • RStudio

• Functions, commands, and R code are written as inline code, e.g., x <- 5, or in code blocks:

x <- 5
print(x)

• Code output appears in a colored cell, prefaced by “##”:

## [1] 5

• Package names are written in {curly braces}:

  • {tidyverse}
  • {lubridate}

• Variable names (for vectors, data frames and other tabular data, etc.) are written in bold text:

  • x
  • y
  • airline_flights

• Column names within a data frame are also written in bold text, whether referred to separately or as part of the table:

  • origin
  • destination
  • airline_flights$origin
  • airline_flights[[“destination”]]

• Filenames and associated file types are written between “quotation marks”:

  • “myData.R”
  • “.csv”

• Full file path names are written in “quotation marks”:

  • “/Users/Tony/Desktop/myData.R”
  • “~/Desktop/myData.R”
  • “C:\Documents and Settings\Anthony Di Fiore\Desktop\myData.R”

• Directory names are written as inline code followed by a slash:

  • img/, src/

• Important concepts are written in italics when first referred to:

  • working directory
  • environment
  • namespace

• Menu names and menu commands are written in bold text:

  • File > New File > R Script

• Argument values or values to be replaced are written in lowercase text between <angle brackets>, where that entire text, brackets included, should be replaced with the text being asked for:

  • setwd("<your working directory>")
  • “<your file name>.csv”

• Constants are written in italics:

  • pi

• Argument names and assignments are written as inline code:

  • Set na.rm=TRUE
  • Set data=df
  • Set filename="~/Users/Tony/Desktop/output.csv"

• Names of RStudio panes are written in bold text:

  • Console
  • Environment/History

• Names of RStudio tabs within panes are written in italics:

  • History
  • Plots
  • Help
  • Git

• Names of dialog boxes are also written in italics:

  • Global Options

• Button names and sections within dialog boxes are written in quotation marks:

  • “OK”
  • “Cancel”

• Check box names within dialog boxes are written in inline code:

  • Restore .RData into workspace at startup

• R object class names are written in bold text:

  • numeric
  • function

• git repository branch names are written as inline code:

  • main
  • origin/main

• Full URLs/links are written in inline code and may include hyperlinks:

  • https://cran.r-project.org/
  • https://difiore.github.io/ada-2026/