![]() Use devtools::load_all() as needed and use your usual interactive workflow for developing the code chunks. ![]() Start adding prose and code chunks to the vignette. Once you have the draft vignette, the workflow is straightforward: You also call use_vignette() to create your second and all subsequent vignettes it will just skip any setup that’s already been done. This draft document has the key elements of an R Markdown vignette and leaves you in a position to add your content. gitignore to ensure that files created as a side effect of previewing your vignettes are kept out of source control (we’ll say more about this later). Usethis :: use_vignette ( "my-vignette" )Īdds the necessary dependencies to DESCRIPTION, i.e. adds knitr to the VignetteBuilder field and adds both knitr and rmarkdown to Suggests.ĭrafts a vignette, vignettes/my-vignette.Rmd.Īdds some patterns to. In vignettes, more than anywhere else, the answer to “But how do I do X?” is often “Don’t do X”. Base R’s vignette system allows for various complicated maneuvers that we just try to avoid. For example, we treat inst/doc/ 3 in the same way as man/ and NAMESPACE, i.e. as something semi-opaque that is managed by automated tooling and that we don’t modify by hand. In general, we embrace a somewhat circumscribed vignette workflow, i.e. there are many things that base R allows for, that we simply don’t engage in. If you’re not already familiar with R Markdown you’ll need to learn the basics elsewhere a good place to start is. In this book, we’re going to use R Markdown to write our vignettes 2, just as we did for function documentation in Section 16.1.3. This chapter is ostensibly about vignettes, but the way we do things is heavily influenced by how those vignettes fit into a pkgdown website. A pkgdown website presents all of the documentation of a package in a cohesive, interlinked way that makes it more navigable and useful. The technical distinction between a vignette (which ships with a package) and an article (which is only available on the website see Section 17.4.1) is something the package developer needs to think about. Note that pkgdown uses the term “article”, which feels like the right vocabulary for package users. Compare the above to what it feels like to access tidyr’s vignettes from its website. However, we much prefer to discover and read vignettes from a package’s website, which is the topic of Chapter 19 1. To see vignettes for a package that you haven’t installed, look at the “Vignettes” listing on its CRAN page, e.g. ![]() vignette("rectangle", package = "tidyr"). You can read a specific vignette with the vignette() function, e.g. To limit that to a particular package, you can specify the package’s name like so: browseVignettes("tidyr"). Many existing packages have vignettes and you can see all the vignettes associated with your installed packages with browseVignettes(). Vignettes afford you different opportunities than help topics: you have much more control over the integration of code and prose and it’s a better setting for showing how multiple functions work together. The vignette format is perfect for showing a workflow that solves that particular problem, start to finish. In contrast, a vignette can be framed around a target problem that your package is designed to solve. Function documentation is great if you know the name of the function you need, but it’s useless otherwise. ![]() Your urlEnsembleLink is only valid for the html case.A vignette is a long-form guide to your package. ![]()
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