Generate width and height of a device based upon a given number of plots per page

Generate width and height in pixels of a device based upon a given number of plots per page

get_device_size(
  nplots = 1,
  layout = "portrait",
  units = c("in", "cm", "mm", "px"),
  dpi = 300
)

get_device_size_pixel(nplots = 1, layout = "portrait", dpi = 300)

Arguments

nplots: Number of plots per page.
layout: Either 'portrait' or 'landscape'.
units: One of ('in', 'cm', 'mm', 'px'). If not supplied, defaults to 'in'.
dpi: Plot resolution in dot per inch.

Value

A named numeric vector of width and height

Examples

library(ggplot2)

dims <- get_device_size(nplots = 4,
                        units = 'in',
                        dpi = 300)

plot <- ggplot(mpg, aes(class, hwy)) +
  geom_point()

ggsave(filename = 'plot.png',
       plot = plot,
       path = tempdir(),
       width = dims['width'],
       height = dims['height'],
       units = 'in',
       dpi = 300)