Cannot create new plotting window (device?) with par(new=T)

Question

I want to create a new window for each additional plot in R. I tried

plot(rnorm(20), new=TRUE)

and also

par(new=T)
plot(rnorm(20), new=TRUE)

Neither gives me a new window. Do I really need to create a new device?

Answer 1

The plot.new() function is used to start a new plot on the current device and will open a default device if there is not a device currently open. If you want a new device (so that you have the old plot in one window and the new plot in another window) then use dev.new() or other device functions.