4  About

R terminology may differ from that commonly used in mathematics and statistics. For explanations and references to the terms and abbreviations used in this Quarto book, please refer to Chapter 9.

4.1 Environment

This Quarto book is created under R version 4.5.2 (2025-10-31) with the aid of packages knitr (Xie 2025, v1.51; 2015; 2014), quarto (Allaire and Dervieux 2024, v1.5.1 with Quarto v1.9.27) and rmarkdown (Allaire et al. 2025, v2.30; Xie et al. 2018, 2020). Documentation and check are supported by packages roxygen2 (Wickham, Danenberg, et al. 2025, v7.3.3) and devtools (Wickham, Hester, et al. 2025, v2.4.6). Package(s) sloop (Wickham 2019, v1.0.1) and xfun (Xie 2026, v0.56) are also used in the creation of this book.

An Integrated Development Environment (IDE), e.g., RStudio (Posit Team 2026) or Positron, is not required, but highly recommended.

Listing 4.1: macOS version on author’s computer, in Terminal 
sw_vers
# ProductName:      macOS
# ProductVersion:       26.3.1
# BuildVersion:     25D2128
Listing 4.2: macOS version on author’s computer, in R 
Sys.info()[c('sysname', 'release', 'machine')]
#  sysname  release  machine 
# "Darwin" "25.3.0"  "arm64"
Listing 4.3: R version on author’s computer 
R.version
#                _                           
# platform       aarch64-apple-darwin20      
# arch           aarch64                     
# os             darwin20                    
# system         aarch64, darwin20           
# status                                     
# major          4                           
# minor          5.2                         
# year           2025                        
# month          10                          
# day            31                          
# svn rev        88974                       
# language       R                           
# version.string R version 4.5.2 (2025-10-31)
# nickname       [Not] Part in a Rumble

Readers are strongly advised to download and install the latest version of R, currently R version 4.5.2 (2025-10-31), for macOS (Listing 4.4) or for Windows (Listing 4.5).

Listing 4.4: Download latest version of R for macOS 
'https://cran.r-project.org/bin/macosx/' |>
  knitr::include_url(height = '250px')
Listing 4.5: Download latest version of R for Windows 
'https://cran.r-project.org/bin/windows/base/' |>
  knitr::include_url(height = '250px')

4.2 Dependency

The BibTeX and/or BibLaTeX entry for LaTeX users is

citation(package = 'ordPanel') |> 
  toBibtex()
@Manual{,
  title = {ordPanel: Ordered Panel},
  author = {Tingting Zhan},
  year = {2026},
  note = {R package version 0.1.0.20260306, commit 2691e29b5c540b76302e61b2d120f192d1e47ef5},
  url = {https://github.com/tingtingzhan/ordPanel},
}

The ordPanel package Imports the packages