qr_fullpivoting.cpp
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1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
5 // Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
6 //
7 // This Source Code Form is subject to the terms of the Mozilla
8 // Public License v. 2.0. If a copy of the MPL was not distributed
9 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
10 
11 #include "main.h"
12 #include <Eigen/QR>
13 #include "solverbase.h"
14 
15 template<typename MatrixType> void qr()
16 {
17  STATIC_CHECK(( internal::is_same<typename FullPivHouseholderQR<MatrixType>::StorageIndex,int>::value ));
18 
19  static const int Rows = MatrixType::RowsAtCompileTime, Cols = MatrixType::ColsAtCompileTime;
20  Index max_size = EIGEN_TEST_MAX_SIZE;
21  Index min_size = numext::maxi(1,EIGEN_TEST_MAX_SIZE/10);
22  Index rows = Rows == Dynamic ? internal::random<Index>(min_size,max_size) : Rows,
23  cols = Cols == Dynamic ? internal::random<Index>(min_size,max_size) : Cols,
24  cols2 = Cols == Dynamic ? internal::random<Index>(min_size,max_size) : Cols,
25  rank = internal::random<Index>(1, (std::min)(rows, cols)-1);
26 
27  typedef typename MatrixType::Scalar Scalar;
29  MatrixType m1;
32  VERIFY_IS_EQUAL(rank, qr.rank());
33  VERIFY_IS_EQUAL(cols - qr.rank(), qr.dimensionOfKernel());
34  VERIFY(!qr.isInjective());
35  VERIFY(!qr.isInvertible());
36  VERIFY(!qr.isSurjective());
37 
38  MatrixType r = qr.matrixQR();
39 
40  MatrixQType q = qr.matrixQ();
42 
43  // FIXME need better way to construct trapezoid
44  for(int i = 0; i < rows; i++) for(int j = 0; j < cols; j++) if(i>j) r(i,j) = Scalar(0);
45 
46  MatrixType c = qr.matrixQ() * r * qr.colsPermutation().inverse();
47 
49 
50  // stress the ReturnByValue mechanism
51  MatrixType tmp;
52  VERIFY_IS_APPROX(tmp.noalias() = qr.matrixQ() * r, (qr.matrixQ() * r).eval());
53 
54  check_solverbase<MatrixType, MatrixType>(m1, qr, rows, cols, cols2);
55 
56  {
57  MatrixType m2, m3;
58  Index size = rows;
59  do {
60  m1 = MatrixType::Random(size,size);
61  qr.compute(m1);
62  } while(!qr.isInvertible());
63  MatrixType m1_inv = qr.inverse();
64  m3 = m1 * MatrixType::Random(size,cols2);
65  m2 = qr.solve(m3);
66  VERIFY_IS_APPROX(m2, m1_inv*m3);
67  }
68 }
69 
70 template<typename MatrixType> void qr_invertible()
71 {
72  using std::log;
73  using std::abs;
75  typedef typename MatrixType::Scalar Scalar;
76 
77  Index max_size = numext::mini(50,EIGEN_TEST_MAX_SIZE);
78  Index min_size = numext::maxi(1,EIGEN_TEST_MAX_SIZE/10);
79  Index size = internal::random<Index>(min_size,max_size);
80 
82  m1 = MatrixType::Random(size,size);
83 
85  {
86  // let's build a matrix more stable to inverse
87  MatrixType a = MatrixType::Random(size,size*2);
88  m1 += a * a.adjoint();
89  }
90 
92  VERIFY(qr.isInjective());
93  VERIFY(qr.isInvertible());
94  VERIFY(qr.isSurjective());
95 
96  check_solverbase<MatrixType, MatrixType>(m1, qr, size, size, size);
97 
98  // now construct a matrix with prescribed determinant
99  m1.setZero();
100  for(int i = 0; i < size; i++) m1(i,i) = internal::random<Scalar>();
101  RealScalar absdet = abs(m1.diagonal().prod());
102  m3 = qr.matrixQ(); // get a unitary
103  m1 = m3 * m1 * m3;
104  qr.compute(m1);
105  VERIFY_IS_APPROX(absdet, qr.absDeterminant());
106  VERIFY_IS_APPROX(log(absdet), qr.logAbsDeterminant());
107 }
108 
109 template<typename MatrixType> void qr_verify_assert()
110 {
111  MatrixType tmp;
112 
114  VERIFY_RAISES_ASSERT(qr.matrixQR())
115  VERIFY_RAISES_ASSERT(qr.solve(tmp))
116  VERIFY_RAISES_ASSERT(qr.transpose().solve(tmp))
117  VERIFY_RAISES_ASSERT(qr.adjoint().solve(tmp))
118  VERIFY_RAISES_ASSERT(qr.matrixQ())
119  VERIFY_RAISES_ASSERT(qr.dimensionOfKernel())
120  VERIFY_RAISES_ASSERT(qr.isInjective())
121  VERIFY_RAISES_ASSERT(qr.isSurjective())
122  VERIFY_RAISES_ASSERT(qr.isInvertible())
123  VERIFY_RAISES_ASSERT(qr.inverse())
124  VERIFY_RAISES_ASSERT(qr.absDeterminant())
125  VERIFY_RAISES_ASSERT(qr.logAbsDeterminant())
126 }
127 
128 EIGEN_DECLARE_TEST(qr_fullpivoting)
129 {
130  for(int i = 0; i < 1; i++) {
131  CALL_SUBTEST_5( qr<Matrix3f>() );
132  CALL_SUBTEST_6( qr<Matrix3d>() );
133  CALL_SUBTEST_8( qr<Matrix2f>() );
134  CALL_SUBTEST_1( qr<MatrixXf>() );
135  CALL_SUBTEST_2( qr<MatrixXd>() );
136  CALL_SUBTEST_3( qr<MatrixXcd>() );
137  }
138 
139  for(int i = 0; i < g_repeat; i++) {
140  CALL_SUBTEST_1( qr_invertible<MatrixXf>() );
141  CALL_SUBTEST_2( qr_invertible<MatrixXd>() );
142  CALL_SUBTEST_4( qr_invertible<MatrixXcf>() );
143  CALL_SUBTEST_3( qr_invertible<MatrixXcd>() );
144  }
145 
146  CALL_SUBTEST_5(qr_verify_assert<Matrix3f>());
147  CALL_SUBTEST_6(qr_verify_assert<Matrix3d>());
148  CALL_SUBTEST_1(qr_verify_assert<MatrixXf>());
149  CALL_SUBTEST_2(qr_verify_assert<MatrixXd>());
150  CALL_SUBTEST_4(qr_verify_assert<MatrixXcf>());
151  CALL_SUBTEST_3(qr_verify_assert<MatrixXcd>());
152 
153  // Test problem size constructors
159 }
MatrixType
MatrixXf MatrixType
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autogenerated on Fri Nov 1 2024 03:34:50