Semi-transparency in RStudio

Question

I\'m trying to create a plot with a semi-transparent confidence region around the regression line:

library(car)
library(ggplot2)
library(effects)

mod <- lm(s         


        

Answer 1

per request of the OP:

Can you paste the output of getOption("bitmapType") in your config? If it's not "cairo" try setting it to that via options(bitmapType="cairo") and see if you get the same error.