From: wolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Tue, 3 Jun 2003 14:50:47 +0000 (+0000)
Subject: Add.
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a62692902388246ae23671599a30062021caa96;p=dealii-svn.git

Add.


git-svn-id: https://svn.dealii.org/trunk@7729 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/tests/bits/block_sparse_matrix_1.cc b/tests/bits/block_sparse_matrix_1.cc
new file mode 100644
index 0000000000..2decc20e67
--- /dev/null
+++ b/tests/bits/block_sparse_matrix_1.cc
@@ -0,0 +1,124 @@
+//----------------------------  block_sparse_matrix_1.cc  ---------------------------
+//    $Id$
+//    Version: $Name$
+//
+//    Copyright (C) 2002, 2003 by the deal.II authors and Brian Carnes
+//
+//    This file is subject to QPL and may not be  distributed
+//    without copyright and license information. Please refer
+//    to the file deal.II/doc/license.html for the  text  and
+//    further information on this license.
+//
+//----------------------------  block_sparse_matrix_1.cc  ---------------------------
+
+// test by Brian: check some of the scaling operations on matrices
+
+#include <iostream>
+#include <fstream>
+#include <cstdlib>
+
+#include <base/quadrature_lib.h>
+#include <base/function.h>
+
+#include <fe/fe_q_hierarchical.h>
+#include <fe/fe_values.h>
+
+#include <dofs/dof_tools.h>
+
+#include <lac/full_matrix.h>
+#include <lac/pointer_matrix.h>
+#include <lac/block_matrix_array.h>
+#include <lac/block_sparse_matrix.h>
+#include <lac/sparse_matrix.h>
+#include <lac/block_sparsity_pattern.h>
+#include <lac/sparsity_pattern.h>
+#include <lac/block_vector.h>
+#include <lac/vector.h>
+#include <lac/solver_cg.h>
+#include <lac/sparse_ilu.h>
+#include <lac/precondition.h>
+#include <lac/solver_control.h>
+#include <lac/vector_memory.h>
+
+#include <grid/tria.h>
+#include <grid/grid_generator.h>
+
+#include <numerics/vectors.h>
+#include <numerics/matrices.h>
+
+
+
+int main()
+{
+  std::ofstream logfile("block_sparse_matrix_1.output");
+  deallog.attach(logfile);
+  deallog.depth_console(0);
+
+  BlockSparseMatrix<double> B;
+
+  Triangulation<2> tria;  
+  GridGenerator::hyper_cube (tria,0,1);
+  tria.refine_global (1);
+
+  FE_Q_Hierarchical<2> fe (1);
+  DoFHandler<2> dof_handler (tria);
+  dof_handler.distribute_dofs (fe);
+    
+  BlockSparsityPattern sparsity_pattern;
+  sparsity_pattern.reinit (2,2);
+  sparsity_pattern.collect_sizes ();
+  
+  sparsity_pattern.block(0,0).reinit (dof_handler.n_dofs(),
+				      dof_handler.n_dofs(),
+				      dof_handler.max_couplings_between_dofs());
+  sparsity_pattern.block(0,1).reinit (dof_handler.n_dofs(),
+				      1,
+				      1);
+  sparsity_pattern.block(1,0).reinit (1,
+				      dof_handler.n_dofs(),
+				      dof_handler.n_dofs());
+  sparsity_pattern.block(1,1).reinit (1,
+				      1,
+				      1);
+  sparsity_pattern.collect_sizes ();
+  
+  DoFTools::make_sparsity_pattern (dof_handler, sparsity_pattern.block(0,0));
+  
+  for (unsigned int j=0; j<dof_handler.n_dofs (); ++j)
+  {
+    sparsity_pattern.block(0,1).add (j,0);
+    sparsity_pattern.block(1,0).add (0,j);
+  }
+  sparsity_pattern.block(1,1).add (0,0);
+  sparsity_pattern.compress ();
+  
+  B.reinit (sparsity_pattern);  
+  
+  QGauss<2> qr (2); 
+  FEValues<2> fe_values (dof_handler.get_fe(), 
+			 qr, UpdateFlags(update_values    |
+					 update_gradients |
+					 update_q_points  |
+					 update_JxW_values));
+
+  MatrixTools::create_laplace_matrix (dof_handler, qr, B.block(0,0));
+  B.block(1,1).add (0,0,1.);
+
+  B.print_formatted (deallog.get_file_stream (),3,false);
+
+  B.block(0,0) *= 10.;
+  B.print_formatted (deallog.get_file_stream (),3,false);
+  
+  B *= 10.;
+  B.print_formatted (deallog.get_file_stream (),3,false);
+  
+  B /= 10.;
+  B.print_formatted (deallog.get_file_stream (),3,false);
+  
+  B.block(0,0) /= 10.;
+  B.print_formatted (deallog.get_file_stream (),3,false);
+
+  B.clear();
+  
+  return 0;
+}