Chapter 17 Figure size

17.1 Size of saved image

When downloading a graph, you can specify the height and width of the image. For example:

ggplot(mpg, aes(x = cty, fill = class)) + 
ggsave("myplot_10_by_10.pdf", width = 10, height = 10)

If you meant 10 centimer instead of inch, you can either:

ggsave("myplot_10_by_10cm.pdf", width = 10/2.54, height = 10/2.54)
ggsave("myplot_10_by_10cm2.pdf", width = 10, height = 10, unit = "cm")

17.2 Size of image in knitted document

Getting the size of your image right in the Rmarkdown-file takes some effort. You can find help here, here, and here.

The basics: in the chunks you can specify figure size options within ```r{ }:

For instance, this:

Generates this

And this:

produces this: