applying a function to the output of dplyr's group_by

Question

I would like to subset a large dataframe and create a ggplot of each grouping. Sounds like a perfect candidate for dplyr but I\'m running into issues calling functions on th

Answer 1

Well, you have a parenthesis problem and a file naming problem so maybe it's one of those that you are referring to. I'm assuming

iris %>%
  group_by(Species) %>%
  do({
      p <- ggplot(., aes(x=Sepal.Length, y=Sepal.Width)) + geom_point()
      ggsave(p, filename=paste0(unique(.$Species),".pdf"))
     })

would fix your problem.