1*bf2c3715SXin Li // This file is triangularView of Eigen, a lightweight C++ template library
2*bf2c3715SXin Li // for linear algebra.
3*bf2c3715SXin Li //
4*bf2c3715SXin Li // Copyright (C) 2008-2009 Gael Guennebaud <[email protected]>
5*bf2c3715SXin Li //
6*bf2c3715SXin Li // This Source Code Form is subject to the terms of the Mozilla
7*bf2c3715SXin Li // Public License v. 2.0. If a copy of the MPL was not distributed
8*bf2c3715SXin Li // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9*bf2c3715SXin Li
10*bf2c3715SXin Li #include "main.h"
11*bf2c3715SXin Li
bandmatrix(const MatrixType & _m)12*bf2c3715SXin Li template<typename MatrixType> void bandmatrix(const MatrixType& _m)
13*bf2c3715SXin Li {
14*bf2c3715SXin Li typedef typename MatrixType::Scalar Scalar;
15*bf2c3715SXin Li typedef typename NumTraits<Scalar>::Real RealScalar;
16*bf2c3715SXin Li typedef Matrix<Scalar,Dynamic,Dynamic> DenseMatrixType;
17*bf2c3715SXin Li
18*bf2c3715SXin Li Index rows = _m.rows();
19*bf2c3715SXin Li Index cols = _m.cols();
20*bf2c3715SXin Li Index supers = _m.supers();
21*bf2c3715SXin Li Index subs = _m.subs();
22*bf2c3715SXin Li
23*bf2c3715SXin Li MatrixType m(rows,cols,supers,subs);
24*bf2c3715SXin Li
25*bf2c3715SXin Li DenseMatrixType dm1(rows,cols);
26*bf2c3715SXin Li dm1.setZero();
27*bf2c3715SXin Li
28*bf2c3715SXin Li m.diagonal().setConstant(123);
29*bf2c3715SXin Li dm1.diagonal().setConstant(123);
30*bf2c3715SXin Li for (int i=1; i<=m.supers();++i)
31*bf2c3715SXin Li {
32*bf2c3715SXin Li m.diagonal(i).setConstant(static_cast<RealScalar>(i));
33*bf2c3715SXin Li dm1.diagonal(i).setConstant(static_cast<RealScalar>(i));
34*bf2c3715SXin Li }
35*bf2c3715SXin Li for (int i=1; i<=m.subs();++i)
36*bf2c3715SXin Li {
37*bf2c3715SXin Li m.diagonal(-i).setConstant(-static_cast<RealScalar>(i));
38*bf2c3715SXin Li dm1.diagonal(-i).setConstant(-static_cast<RealScalar>(i));
39*bf2c3715SXin Li }
40*bf2c3715SXin Li //std::cerr << m.m_data << "\n\n" << m.toDense() << "\n\n" << dm1 << "\n\n\n\n";
41*bf2c3715SXin Li VERIFY_IS_APPROX(dm1,m.toDenseMatrix());
42*bf2c3715SXin Li
43*bf2c3715SXin Li for (int i=0; i<cols; ++i)
44*bf2c3715SXin Li {
45*bf2c3715SXin Li m.col(i).setConstant(static_cast<RealScalar>(i+1));
46*bf2c3715SXin Li dm1.col(i).setConstant(static_cast<RealScalar>(i+1));
47*bf2c3715SXin Li }
48*bf2c3715SXin Li Index d = (std::min)(rows,cols);
49*bf2c3715SXin Li Index a = std::max<Index>(0,cols-d-supers);
50*bf2c3715SXin Li Index b = std::max<Index>(0,rows-d-subs);
51*bf2c3715SXin Li if(a>0) dm1.block(0,d+supers,rows,a).setZero();
52*bf2c3715SXin Li dm1.block(0,supers+1,cols-supers-1-a,cols-supers-1-a).template triangularView<Upper>().setZero();
53*bf2c3715SXin Li dm1.block(subs+1,0,rows-subs-1-b,rows-subs-1-b).template triangularView<Lower>().setZero();
54*bf2c3715SXin Li if(b>0) dm1.block(d+subs,0,b,cols).setZero();
55*bf2c3715SXin Li //std::cerr << m.m_data << "\n\n" << m.toDense() << "\n\n" << dm1 << "\n\n";
56*bf2c3715SXin Li VERIFY_IS_APPROX(dm1,m.toDenseMatrix());
57*bf2c3715SXin Li
58*bf2c3715SXin Li }
59*bf2c3715SXin Li
60*bf2c3715SXin Li using Eigen::internal::BandMatrix;
61*bf2c3715SXin Li
EIGEN_DECLARE_TEST(bandmatrix)62*bf2c3715SXin Li EIGEN_DECLARE_TEST(bandmatrix)
63*bf2c3715SXin Li {
64*bf2c3715SXin Li for(int i = 0; i < 10*g_repeat ; i++) {
65*bf2c3715SXin Li Index rows = internal::random<Index>(1,10);
66*bf2c3715SXin Li Index cols = internal::random<Index>(1,10);
67*bf2c3715SXin Li Index sups = internal::random<Index>(0,cols-1);
68*bf2c3715SXin Li Index subs = internal::random<Index>(0,rows-1);
69*bf2c3715SXin Li CALL_SUBTEST(bandmatrix(BandMatrix<float>(rows,cols,sups,subs)) );
70*bf2c3715SXin Li }
71*bf2c3715SXin Li }
72