scatter 4dplot3D, from Kar Soetaert, is an R package containing many functions for 2D and 3D plotting: scatter3D, points3D, s3D, text3D, ribbon3d, hist3D, etc. In addition to the x, y (and z) values, an additional data dimension can beChaos Scatter lets you quickly and efficiently populate surfaces, sps, and volumes with vast numbers of objects.