started an implementation of BandMatrix: at least the read/write access

to the main/sub/super diagonals seems to work well.

2 files changed, 62 insertions, 0 deletions

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 886731d45..5e1adcbf4 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -111,6 +111,7 @@ ei_add_test(array_replicate)
 ei_add_test(array_reverse)
 ei_add_test(triangular)
 ei_add_test(product_triangular)
+ei_add_test(bandmatrix)
 ei_add_test(cholesky " " "${GSL_LIBRARIES}")
 ei_add_test(lu ${EI_OFLAG})
 ei_add_test(determinant)
diff --git a/test/bandmatrix.cpp b/test/bandmatrix.cpp
new file mode 100644
index 000000000..96ccda2cf
--- /dev/null
+++ b/test/bandmatrix.cpp
@@ -0,0 +1,61 @@
+// This file is triangularView of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2008-2009 Gael Guennebaud <gael.guennebaud@gmail.com>
+//
+// Eigen is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 3 of the License, or (at your option) any later version.
+//
+// Alternatively, you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of
+// the License, or (at your option) any later version.
+//
+// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License and a copy of the GNU General Public License along with
+// Eigen. If not, see <http://www.gnu.org/licenses/>.
+
+#include "main.h"
+
+template<typename MatrixType> void bandmatrix(MatrixType& m)
+{
+  typedef typename MatrixType::Scalar Scalar;
+  typedef typename NumTraits<Scalar>::Real RealScalar;
+  typedef Matrix<Scalar,Dynamic,Dynamic> DenseMatrixType;
+
+  int size = m.rows();
+
+  DenseMatrixType dm1(size,size);
+  dm1.setZero();
+
+  m.diagonal().setConstant(123);
+  dm1.diagonal().setConstant(123);
+  for (int i=1; i<=m.supers();++i)
+  {
+    m.diagonal(i).setConstant(i);
+    dm1.diagonal(i).setConstant(i);
+  }
+  for (int i=1; i<=m.subs();++i)
+  {
+    m.diagonal(-i).setConstant(-i);
+    dm1.diagonal(-i).setConstant(-i);
+  }
+  std::cerr << m.toDense() << "\n\n" << dm1 << "\n\n";
+  VERIFY_IS_APPROX(dm1,m.toDense());
+
+}
+
+void test_bandmatrix()
+{
+  for(int i = 0; i < g_repeat ; i++) {
+    BandMatrix<float,Dynamic,Dynamic,Dynamic> m(6,3,2);
+    CALL_SUBTEST( bandmatrix(m) );
+  }
+}