Define knitr options for an R Markdown output format that creates PDF output.
knitr_options_pdf(fig_width, fig_height, fig_crop, dev = "pdf")
Default width (in inches) for figures
Default height (in inches) for figures
TRUE
to automatically apply the pdfcrop
utility
(if available) to pdf figures
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.