step-2

step-2, a dealii code which assigns degrees of freedom to the nodes of a grid, determines the sparsity pattern of the corresponding matrix, and then reorders the variables to get a tighter bandwidth.

Reference:

1. Wolfgang Bangerth, Ralf Hartmann, Guido Kanschat,
   DEAL.II - a general-purpose object-oriented finite element library,
   ACM Transactions on Mathematical Software,
   Volume 33, Number 4, article 24, August 2007.

Source code:

• CMakeLists.txt, the file needed by cmake.
• step-2.cc, the source code for the example.
• step-2.sh, a shell script which contains the commands to create the makefile and run the example.
• step-2.txt, the output file.

• sparsity_pattern_gnuplot.sh, a bash code which can invoke gnuplot to plot a sparsity pattern.
• sparsity_pattern.1
• sparsity_pattern.png
• sparsity_pattern.2,
• sparsity_pattern.png,