render_book: Render multiple R Markdown documents into a book
In lyz123456653/bookdown: Authoring Books and Technical Documents with R Markdown

Description Usage Arguments Details Examples

Render multiple R Markdown files under the current working directory into a book. It can be used in the RStudio IDE (specifically, the knit field in YAML). The preview_chapter() function is a wrapper of render_book(preview = TRUE).

render_book(
  input,
  output_format = NULL,
  ...,
  clean = TRUE,
  envir = parent.frame(),
  clean_envir = !interactive(),
  output_dir = NULL,
  new_session = NA,
  preview = FALSE,
  encoding = "UTF-8",
  config_file = "_bookdown.yml"
)

preview_chapter(..., envir = parent.frame())

`input`	An input filename (or multiple filenames). If `preview = TRUE`, only files specified in this argument are rendered, otherwise all R Markdown files specified by the book are rendered.
`output_format, ..., clean, envir`	Arguments to be passed to `rmarkdown::render()`. For `preview_chapter()`, `...` is passed to `render_book()`.
`clean_envir`	Whether to clean up the environment `envir` before rendering the book. By default, the environment is cleaned when rendering the book in a non-interactive R session.
`output_dir`	The output directory. If `NULL`, a field named `output_dir` in the configuration file ‘_bookdown.yml’ will be used (possibly not specified, either, in which case a directory name ‘_book’ will be used).
`new_session`	Whether to use new R sessions to compile individual Rmd files (if not provided, the value of the `new_session` option in ‘_bookdown.yml’ is used; if this is also not provided, `new_session = FALSE`).
`preview`	Whether to render and preview the input files specified by the `input` argument. Previewing a certain chapter may save compilation time as you actively work on this chapter, but the output may not be accurate (e.g. cross-references to other chapters will not work).
`encoding`	Ignored. The character encoding of all input files is supposed to be UTF-8.
`config_file`	The book configuration file.

There are two ways to render a book from Rmd files. The default way (new_session = FALSE) is to merge Rmd files into a single file and render this file. You can also choose to render each individual Rmd file in a new R session (new_session = TRUE).