limit to geom_path size arguments?

Question

It seems like there is a lower limit to how thin a line can be with geom_path

m <- ggplot(economics, aes(unemploy/pop, psavert))
m + geom_path(size = 0.05) ## same as below
m + geom_path(size = 0.5)  ## same as above

How can I make it thinner than this limit?

Also if you use `geom_line` instead of `geom_path` then you can also adjust the size outside of the aesthetic like you have in your post. — Lloyd Christmas, Nov 08 '17 at 15:31
`aes` arguments are interpreted as `strings`. This just adds a legend with the line labeled as `0.5` — Rafael, Nov 08 '17 at 15:31
`geom_line` will act differently than `geom_path`, and also has a lower limit to how thin it can be. — Rafael, Nov 08 '17 at 15:33

score 1 · Accepted Answer · answered Aug 16 '18 at 21:16

I posted a similar question here about not being able to see a small differences in line size when plotting in RStudio. The answer was that the differences in line size became noticeable once I saved the plot with ggsave(). The limit seemed to be how finely the RStudio graphics device/viewer could display different size lines.

Using your example, I also don't see a noticeable difference in line size when plotting size = 0.05 and size = 0.5 in RStudio. After saving the plot to a pdf with ggsave() though, I can see the difference after zooming in a bit.

limit to geom_path size arguments?

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