How can I combine multiple ggplot2 elements into the return of a function?
If I try to manually compose some elements of a ggplot2 plot, it works just fine: > p <- ggplot(aes(x = mpg, y = hp), data = mtcars) > p + geom_vline(xintercept = 20) + geom_point(data = mtcars) But if I try to bundle some of the composition into a function, I get an error: > myFunction <- function() { + return( + geom_vline(xintercept = 20) + geom_point(data = mtcars) + ) + } > p <- ggplot(aes(x
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