Change the unit of figure size

In chunkhooks: Chunk Hooks for 'R Markdown'

By default, R Markdown employs inch as a unit of figure size. You can change it by hook_figure_unit.

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

CAUTIONS

• This hook must not run twice in a document. Otherwise, you will face unexpected figure size.
• RStudio IDE do not detect the hook and treats fig.width and fig.height in inches.
• This hook sets NULL to the fig.retina chunk option.

Basic usage

hook_figure_unit() changes to the unit of figure size to millimeters. Note that this hook will not change the default size.

library(chunkhooks)
hook_figure_unit()

# fig.width=50, fig.height=50 (50mm * 50mm)
plot(1)

Other units

You may change default unit by the first argument, unit.

hook_figure_unit("cm")

Choices are followings:

measurements::conv_unit_options$length

chunkhooks documentation built on Aug. 5, 2020, 5:09 p.m.