opts_chunk
controls global chunk options, e.g.
opts_chunk$set(tidy = FALSE)
, which can be overridden by local chunk
options. See all options at https://yihui.org/knitr/options/; some
frequently used options:
eval : whether to evaluate the chunk
echo : whether to echo source code
results
: 'markup'
, 'asis'
, 'hold'
, 'hide'
tidy : whether to reformat R code
cache : whether to cache results
fig.width, fig.height, out.width, out.height : device and output size of figures
include : whether to include the chunk results in output
child : filenames of child documents
engine : language name (R, python, ...)
knit()
: the main function in this package; knit input document and write
output
purl()
: extract R code from an input document
spin()
: spin goat's hair (an R script with roxygen comments) into wool (a
literate programming document to be passed to knit()
)
stitch()
: insert an R script into a template and compile the document
knit_hooks$set()
: set or reset chunk and output hooks
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