rasterpdf is an R package to plot raster graphics in PDF files. This can be
useful when one needs multipage documents, but the plots contain so many
individual elements that use of vector graphics (with grDevices::pdf())
results in inconveniently large file sizes. Internally, rasterpdf plots each
individual page as a PNG, and then combines them in one PDF file.
rasterpdf can be installed from
CRAN with:
install.packages("rasterpdf")Or the development version from GitHub with:
devtools::install_github("ilarischeinin/rasterpdf")rasterpdf's main function raster_pdf() can be used as any graphics device
in R:
library(rasterpdf)
raster_pdf("Rplots.pdf")
plot(iris)
image(volcano)
plot(EuStockMarkets)
dev.off()Or similarly with ggplot2:
library(ggplot2)
library(rasterpdf)
raster_pdf("diamonds.pdf")
ggplot(diamonds, aes(carat, price)) + geom_point()
ggplot(diamonds, aes(carat, price, colour = color)) + geom_point()
ggplot(diamonds, aes(carat, price, colour = clarity)) + geom_point()
dev.off()The output size and resolution can be set with parameters width, height,
units, and res. The default is 7 x 7 inches and 72 ppi. Any other
parameters (...) are passed through to the PNG device function. By default
this is grDevices::png(), but another function can also be specified, such
ragg::agg_png(). The PDF file is by default generated with
grDevices::cairo_pdf() if cairo is available, and grDevices::pdf()
otherwise. Here again it is also possible to specify another function.