The Matlab and R routines for the parabolic, hyperbolic and elliptic PDEs discussed in http://www.scholarpedia.org/article/partial_differential_equations, Part 4, are included in this directory. Specifically, Parabolic: pde1.m, pde1.R Hyperbolic: pde2.m, pde2.R Elliptic: pde3.m, pde3.R These routines should execute by copying and pasting them into a Matlab or R workspace (at the prompt). Only basic versions of Matlab and R are required (no toolboxes, other files, downloads, etc.). Documentation for the routines is included in the Scholarpedia article. Please direct any questions, including any problems in using the routines, to wes1@lehigh.edu. W. E. Schiesser P.S.: R is available as a download from: http://cran.fhcrc.org/