region, a FreeFem++ code which sets up an interesting mesh with four internal boxes where the solution has a jump, and writes the data to files, using the ffmatlib() interface, for subsequent graphics processing by MATLAB or Octave.
The information on this web page is distributed under the MIT license.
region_test, a MATLAB code which plots data from an interesting region that was meshed by FreeFem++() and transferred using ffmatlib().