template package

Generic template for data analysis projects structured as R packages

The template package automates creation of new projects with all the necessary scaffolding: different folders for data, scripts, and functions, plus (optionally) additional files required for an R package structure. It can simultaneously create and synchronise a new repository on GitHub so one can start working immediately.

template can create both projects with or without R package structure. Structuring data analysis projects as R packages (a.k.a. “research compendia”) can bring some advantages (e.g. see this blogpost, this repo, these and these slides or read Marwick et al.). But there are also good reasons why an R package structure may not always be needed or convenient.

Installation

# install.packages("remotes")
remotes::install_github("Pakillo/template")

Usage

First, load the package:

library("template")

Now run the function new_project to create a directory with all the scaffolding (slightly modified from R package structure). For example, to start a new project about tree growth, just use:

new_project("treegrowth")

This will create a new Rstudio project with this structure:

You can create a GitHub repository for the project at the same time:

new_project("treegrowth", github = TRUE, private.repo = FALSE)

You could choose either public or private repository. Note that to create a GitHub repo you will need to have configured your system as explained in https://usethis.r-lib.org/articles/articles/usethis-setup.html.

There are other options you could choose, like setting up testthat or continuous integration (Travis-CI, GitHub Actions…). Or skip R package structure altogether. See ?new_project for all options.

Developing the project

1. Now edit README.Rmd and the DESCRIPTION file with some basic information about your project: title, brief description, licence, package dependencies, etc.

2. Place original (raw) data in data-raw folder. Save all R scripts (or Rmarkdown documents) used for data preparation in the same folder.

3. Save final (clean, tidy) datasets in the data folder. You may write documentation for these data.

4. R scripts or Rmarkdown documents used for data analyses may be placed at the analyses folder. The final manuscript/report may be placed at the manuscript folder. You could use one of the many Rmarkdown templates available out there (e.g. rticles, rrtools or rmdTemplates).

5. If you write custom functions, place them in the R folder. Document all your functions with Roxygen. Write tests for your functions and place them in the tests folder.

6. If your analysis uses functions from other CRAN packages, include these as dependencies (Imports) in the DESCRIPTION file (e.g. using usethis::use_package() or rrtools::add_dependencies_to_description(). Also, use Roxygen @import or @importFrom in your function definitions, or alternatively package::function(), to import these dependencies in the namespace.

7. I recommend using an advanced tool like targets to manage your project workflow. A simpler alternative might be writing a makefile or master script to organise and execute all parts of the analysis. A template makefile is included with this package (use makefile = TRUE when calling new_project).

8. Render Rmarkdown reports using rmarkdown::render, and use Rstudio Build menu to create/update documentation, run tests, build package, etc.

9. Record the exact dependencies of your project. One option is simply running sessionInfo() but many more sophisticated alternatives exist. For example, automagic::make_deps_file() or renv::snapshot() will create a file recording the exact versions of all packages used, which can be used to recreate such environment in the future or in another computer. If you want to use Docker, you could use e.g. containerit::dockerfile() or rrtools::use_dockerfile().

10. Archive your repository (e.g. in Zenodo), get a DOI, and include citation information in your README.

Thanks to:

• Carl Boettiger and his template package
• Jeff Hollister and his manuscriptPackage
• Robert Flight: http://rmflight.github.io/posts/2014/07/analyses_as_packages.html
• Hadley Wickham: http://r-pkgs.had.co.nz/
• Yihui Xie: http://yihui.name/knitr/
• Rstudio

Links

• https://github.com/ropensci/rrrpkg
• https://github.com/Reproducible-Science-Curriculum/rr-init
• http://ropensci.github.io/reproducibility-guide/
• https://github.com/jdblischak/r-project-workflows
• https://github.com/benmarwick/rrtools