knitr_options_html

From rmarkdown v1.15 by Yihui Xie

Define knitr options for an R Markdown output format that creates HTML output.

knitr_options_html(fig_width, fig_height, fig_retina, keep_md,
  dev = "png")

fig_width: Default width (in inches) for figures
fig_height: Default height (in inches) for figures
fig_retina: Scaling to perform for retina displays (defaults to 2, which currently works for all widely used retina displays). Set to NULL to prevent retina scaling. Note that this will always be NULL when keep_md is specified (this is because fig_retina relies on outputting HTML directly into the markdown document).
keep_md: Keep the markdown file generated by knitting.
dev: Graphics device to use for figure output (defaults to png)

An list that can be passed as the knitr argument of the output_format function.

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