R: ggsave .tiff files are too big

A very quick post to solve an annoying problem that I run into a lot. When saving large .tiff files using ggplot, the default file size will be massive.

ggsave("Fig 4a.tiff", plot = p4, width=600, height=450, units="mm", dpi=300)

Be sure to set the compression code. I use lzw compression.

ggsave("Fig 4a.tiff", plot = p4, width=600, height=450, units="mm", dpi=300, compression = "lzw")

In this case, I reduced the file size from >140 mb to 332 kb.