FEM2D_POISSON_SPARSE_ELL is a MATLAB library which defines the geometry and other data for the "ell" problem, an L-shaped region. The problem is suitable for solution by fem2d_poisson_sparse.
This mesh, which uses 65 nodes, was created by starting with a crude mesh, and having it refined by TRIANGULATION_REFINE and renumbered by TRIANGULATION_RCM.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
FEM2D_POISSON_SPARSE_ELL is available in a C++ version and a FORTRAN90 version and a MATLAB version.
FEM2D_POISSON_SPARSE, a MATLAB program which solves the steady (time independent) Poisson equation on an arbitrary 2D triangulated region using MATLAB's sparse solver.
FEM2D_POISSON_SPARSE_BAFFLE, a MATLAB library which defines the geometry of a rectangle channel containing 13 hexagonal baffles, as well as boundary conditions for a given Poisson problem, and is called by fem2d_poisson_sparse as part of a solution procedure.
FEM2D_POISSON_SPARSE_LAKE, a MATLAB library which defines the geometry of a lake-shaped region, as well as boundary conditions for a given Poisson problem, and is called by fem2d_poisson_sparse as part of a solution procedure.
TRIANGULATION_ORDER3_CONTOUR, a MATLAB program which makes a contour plot of scattered data, or of data defined on an order 3 triangulation. In particular, it can display contour plots of scalar data output by fem2d_poisson or fem2d_poisson_sparse.
You can go up one level to the MATLAB source code page.