Generate multiple graphics from within an R function
- by William Doane
I'd like to spawn several graphics windows from within a function in R using ggplot graphics...
testf <- function(a, b) {
devAskNewPage(TRUE)
qplot(a, b);
# grid.newpage(recording = TRUE)
dev.new()
qplot(a, a+a);
# grid.newpage(recording = TRUE)
dev.new()
qplot(b, b+b);
}
library(ggplot2)
x <- rnorm(50)
y <- rnorm(50)
testf(x, y)
However, neither dev.new() nor grid.newpage() seems to flush the preceding plot.
I know that, in R, functions normally only produce the last thing they evaluate, but I'd like to understand the process better and to learn of any possible workarounds.
Thoughts?
