These functions set built-in output hooks for LaTeX, HTML, Markdown, reStructuredText, AsciiDoc and Textile.
render_html()render_asciidoc()
render_latex()
render_sweave()
render_listings()
render_markdown(strict = FALSE, fence_char = "`")
render_jekyll(highlight = c("pygments", "prettify", "none"), extra = "")
render_rst(strict = FALSE)
render_textile()
whether to use strict markdown or reST syntax; for markdown: if
TRUE
, code blocks will be indented by 4 spaces, otherwise they are
put in fences made by three backticks; for reST, if TRUE
, code is
put under two colons and indented by 4 spaces, otherwise is put under the
sourcecode directive (e.g. it is useful for Sphinx)
a single character to be used in the code blocks fence (e.g. it can be a backtick or a tilde, depending on your Markdown rendering engine)
which code highlighting engine to use: for pygments
,
the Liquid syntax is used (default approach Jekyll); for prettify
,
the output is prepared for the JavaScript library prettify.js
; for
none
, no highlighting engine will be used (code blocks are indented
by 4 spaces)
extra tags for the highlighting engine; for pygments
, it
can be 'linenos'
; for prettify
, it can be 'linenums'
NULL
; corresponding hooks are set as a side effect
There are three variants of markdown documents: ordinary markdown
(render_markdown(strict = TRUE)
), extended markdown (e.g. GitHub
Flavored Markdown and pandoc; render_markdown(strict = FALSE)
), and
Jekyll (a blogging system on GitHub; render_jekyll()
). For LaTeX
output, there are three variants as well: knitr's default style
(render_latex()
; use the LaTeX framed package), Sweave style
(render_sweave()
; use Sweave.sty
) and listings style
(render_listings()
; use LaTeX listings package). Default HTML
output hooks are set by render_html()
; render_rst()
and
render_asciidoc()
are for reStructuredText and AsciiDoc respectively.
These functions can be used before knit()
or in the first chunk of the
input document (ideally this chunk has options include = FALSE
and
cache = FALSE
) so that all the following chunks will be formatted as
expected.
You can use knit_hooks
to further customize output hooks; see
references.
See output hooks in https://yihui.name/knitr/hooks/.
Jekyll and Liquid: https://github.com/jekyll/jekyll/wiki/Liquid-Extensions; prettify.js: http://code.google.com/p/google-code-prettify/