Define knitr options for an R Markdown output format that creates HTML output.
knitr_options_html(fig_width, fig_height, fig_retina)Default width (in inches) for figures
Default width (in inches) for figures
Scaling to perform for retina displays
(defaults to 2, which currently works for all widely used
retina displays). Note that this only takes effect if you
are using knitr >= 1.5.21. Set to NULL to prevent
retina scaling.
An list that can be passed as the knitr argument of
the output_format function.