[R] ggsave to .png bug in ggplot2 (?)

[Chris Friedl]

Text is really small and legend boxes are huge in this plot when saved to
.png with ggsave. Plot is correct (i.e. looks the same as the screen) when
saved with dev.print. Saving to .pdf with ggsave give the correct output.

I'm a noob at ggplot2 so this may be user error rather than a bug. However
the interface to ggsave seems simple enough to exclude many possibilities
for screwing this up through ignorance. We'll see I guess.

Here's the example.

require(ggplot2)
x <- data.frame(value=rnorm(5000, mean=0), case="A")
y <- data.frame(value=rnorm(5000, mean=3), case="B")
xy <- rbind(x, y)
p <- ggplot(xy, aes(x=value, colour=case, group=case)) + geom_density()
p

ggsave(p, filename = "xy_ggsave.png") 
dev.print(device=png, width=600, height=600, file="xy_devprint.png")
ggsave(p, filename = "xy_ggsave.pdf") 
dev.print(device=pdf, file="xy_devprint.pdf")



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