knitr::opts_chunk$set( collapse = TRUE, comment = "#>" )
Function two receives in input one numeric value x and it adds 2, in order to returns x+2
Note the various macros within the vignette section of the metadata block above. These are required in order to instruct R how to build the vignette. Note that you should change the title field and the \VignetteIndexEntry to match the title of your vignette.
The html_vignette template includes a basic CSS theme. To override this theme you can specify your own CSS in the document metadata as follows:
output: rmarkdown::html_vignette: css: mystyles.css
By executing function two(8) function will returns 10.
require(mario) two(8)
You can enable figure captions by fig_caption: yes in YAML:
output: rmarkdown::html_vignette: fig_caption: yes
Then you can use the chunk option fig.cap = "Your figure caption." in knitr.
You can write math expressions, e.g. $Y = X\beta + \epsilon$, footnotes^[A footnote here.], and tables, e.g. using knitr::kable().
knitr::kable(head(mtcars, 10))
Also a quote using >:
"He who gives up [code] safety for [code] speed deserves neither." (via)
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