r2stl, R package for visualizing data using a 3D printer Package r2stl converts R data to STL (stereolithography) files that can be used to feed a 3-dimensional printer. The 3-dimensional output from an R function can be materialized into a solid surface in a plastic material, therefore allowing more detailed examination. There are many possible uses for this new R tool, such as to examine mathematical expressions with very irregular shapes, to aid teaching people with impaired vision, to create raised relief maps from digital elevation maps (DEMs), to bridge the gap between mathematical tools and rapid prototyping, and many more. Ian Walker created the function "r2stl" and Jose' Gama assembled the package.
