Define knitr options for an R Markdown output format that creates PDF output.
knitr_options_pdf(fig_width, fig_height, fig_crop)
Default width (in inches) for figures
Default width (in inches) for figures
TRUE
to automatically apply the
pdfcrop
utility (if available) to pdf figures
An list that can be passed as the knitr
argument of
the output_format
function.