You want to create a three-dimensional (3D) scatter plot.

We’ll use the rgl package, which provides an interface to the OpenGL graphics library for 3D graphics. To create a 3D scatter plot, as in Figure 13-14, use plot3d() and pass in a data frame where the first three columns represent x, y, and z coordinates, or pass in three vectors representing the x, y, and z coordinates.

# You may need to install first, with install.packages("rgl")
library(rgl)
plot3d(mtcars$wt, mtcars$disp, mtcars$mpg, type="s", size=0.75, lit=FALSE)

Figure 13-14. A 3D scatter plot

Viewers can rotate the image by clicking and dragging with the mouse, and zoom in and out with the scroll wheel.