plot3d - having two plots at once

Question

plot3d() produces a 3d plot that I can twist around and rotate. But when I call plot3d() again, the previous plot goes away and is replaced by this

Answer 1

like this:

 library(rgl)

 open3d()
 x <- sort(rnorm(1000))
 y <- rnorm(1000)
 z <- rnorm(1000) + atan2(x,y)
 plot3d(x, y, z, col=rainbow(1000))

 open3d()
 x <- sort(rnorm(20))
 y <- rnorm(20)
 z <- rnorm(20) + atan2(x,y)
 plot3d(x, y, z, col=rainbow(20))

The key here is calling open3d before the second plot to open a new "device"