qr.cpp File Reference

#include "main.h"
#include <Eigen/QR>
#include "solverbase.h"

Functions
template<typename MatrixType >
void	qr (const MatrixType &m)
template<typename MatrixType , int Cols2>
void	qr_fixedsize ()
template<typename MatrixType >
void	qr_invertible ()
template<typename MatrixType >
void	qr_verify_assert ()
	EIGEN_DECLARE_TEST (qr)

Function Documentation

EIGEN_DECLARE_TEST()

EIGEN_DECLARE_TEST

(

qr

)

                       {
  for (int i = 0; i < g_repeat; i++) {
    CALL_SUBTEST_1(
        qr(MatrixXf(internal::random<int>(1, EIGEN_TEST_MAX_SIZE), internal::random<int>(1, EIGEN_TEST_MAX_SIZE))));
    CALL_SUBTEST_2(qr(MatrixXcd(internal::random<int>(1, EIGEN_TEST_MAX_SIZE / 2),
                                internal::random<int>(1, EIGEN_TEST_MAX_SIZE / 2))));
    CALL_SUBTEST_3((qr_fixedsize<Matrix<float, 3, 4>, 2>()));
    CALL_SUBTEST_4((qr_fixedsize<Matrix<double, 6, 2>, 4>()));
    CALL_SUBTEST_5((qr_fixedsize<Matrix<double, 2, 5>, 7>()));
    CALL_SUBTEST_11(qr(Matrix<float, 1, 1>()));
  }
 
  for (int i = 0; i < g_repeat; i++) {
    CALL_SUBTEST_1(qr_invertible<MatrixXf>());
    CALL_SUBTEST_6(qr_invertible<MatrixXd>());
    CALL_SUBTEST_7(qr_invertible<MatrixXcf>());
    CALL_SUBTEST_8(qr_invertible<MatrixXcd>());
  }
 
  CALL_SUBTEST_9(qr_verify_assert<Matrix3f>());
  CALL_SUBTEST_10(qr_verify_assert<Matrix3d>());
  CALL_SUBTEST_1(qr_verify_assert<MatrixXf>());
  CALL_SUBTEST_6(qr_verify_assert<MatrixXd>());
  CALL_SUBTEST_7(qr_verify_assert<MatrixXcf>());
  CALL_SUBTEST_8(qr_verify_assert<MatrixXcd>());
 
  // Test problem size constructors
  CALL_SUBTEST_12(HouseholderQR<MatrixXf>(10, 20));
}

References CALL_SUBTEST_1, CALL_SUBTEST_10, CALL_SUBTEST_11, CALL_SUBTEST_12, CALL_SUBTEST_2, CALL_SUBTEST_3, CALL_SUBTEST_4, CALL_SUBTEST_5, CALL_SUBTEST_6, CALL_SUBTEST_7, CALL_SUBTEST_8, CALL_SUBTEST_9, EIGEN_TEST_MAX_SIZE, Eigen::g_repeat, i, qr(), and qr_fixedsize().

qr()

template<typename MatrixType >

void qr

(

const MatrixType &

m

)

                             {
  Index rows = m.rows();
  Index cols = m.cols();
 
  typedef typename MatrixType::Scalar Scalar;
  typedef Matrix<Scalar, MatrixType::RowsAtCompileTime, MatrixType::RowsAtCompileTime> MatrixQType;
 
  MatrixType a = MatrixType::Random(rows, cols);
  HouseholderQR<MatrixType> qrOfA(a);
 
  MatrixQType q = qrOfA.householderQ();
  VERIFY_IS_UNITARY(q);
 
  MatrixType r = qrOfA.matrixQR().template triangularView<Upper>();
  VERIFY_IS_APPROX(a, qrOfA.householderQ() * r);
}

References a, cols, Eigen::HouseholderQR< MatrixType_ >::householderQ(), m, Eigen::HouseholderQR< MatrixType_ >::matrixQR(), Eigen::numext::q, UniformPSDSelfTest::r, rows, VERIFY_IS_APPROX, and VERIFY_IS_UNITARY.

Referenced by EIGEN_DECLARE_TEST(), qr_fixedsize(), qr_invertible(), and qr_verify_assert().

qr_fixedsize()

template<typename MatrixType , int Cols2>

void qr_fixedsize

(

)

                    {
  enum { Rows = MatrixType::RowsAtCompileTime, Cols = MatrixType::ColsAtCompileTime };
  typedef typename MatrixType::Scalar Scalar;
  Matrix<Scalar, Rows, Cols> m1 = Matrix<Scalar, Rows, Cols>::Random();
  HouseholderQR<Matrix<Scalar, Rows, Cols> > qr(m1);
 
  Matrix<Scalar, Rows, Cols> r = qr.matrixQR();
  // FIXME need better way to construct trapezoid
  for (int i = 0; i < Rows; i++)
    for (int j = 0; j < Cols; j++)
      if (i > j) r(i, j) = Scalar(0);
 
  VERIFY_IS_APPROX(m1, qr.householderQ() * r);
 
  check_solverbase<Matrix<Scalar, Cols, Cols2>, Matrix<Scalar, Rows, Cols2> >(m1, qr, Rows, Cols, Cols2);
}

References i, j, m1, qr(), UniformPSDSelfTest::r, and VERIFY_IS_APPROX.

Referenced by EIGEN_DECLARE_TEST().

qr_invertible()

template<typename MatrixType >

void qr_invertible

(

)

                     {
  using std::abs;
  using std::log;
  using std::max;
  using std::pow;
  typedef typename NumTraits<typename MatrixType::Scalar>::Real RealScalar;
  typedef typename MatrixType::Scalar Scalar;
 
  STATIC_CHECK((internal::is_same<typename HouseholderQR<MatrixType>::StorageIndex, int>::value));
 
  int size = internal::random<int>(10, 50);
 
  MatrixType m1(size, size), m2(size, size), m3(size, size);
  m1 = MatrixType::Random(size, size);
 
  if (internal::is_same<RealScalar, float>::value) {
    // let's build a matrix more stable to inverse
    MatrixType a = MatrixType::Random(size, size * 4);
    m1 += a * a.adjoint();
  }
 
  HouseholderQR<MatrixType> qr(m1);
 
  check_solverbase<MatrixType, MatrixType>(m1, qr, size, size, size);
 
  // now construct a matrix with prescribed determinant
  m1.setZero();
  for (int i = 0; i < size; i++) m1(i, i) = internal::random<Scalar>();
  Scalar det = m1.diagonal().prod();
  RealScalar absdet = abs(det);
  m3 = qr.householderQ();  // get a unitary
  m1 = m3 * m1 * m3.adjoint();
  qr.compute(m1);
  VERIFY_IS_APPROX(log(absdet), qr.logAbsDeterminant());
  VERIFY_IS_APPROX(numext::sign(det), qr.signDeterminant());
  // This test is tricky if the determinant becomes too small.
  // Since we generate random numbers with magnitude range [0,1], the average determinant is 0.5^size
  RealScalar tol =
      numext::maxi(RealScalar(pow(0.5, size)), numext::maxi<RealScalar>(abs(absdet), abs(qr.absDeterminant())));
  VERIFY_IS_MUCH_SMALLER_THAN(abs(det - qr.determinant()), tol);
  VERIFY_IS_MUCH_SMALLER_THAN(abs(absdet - qr.absDeterminant()), tol);
}

References a, abs(), i, Eigen::bfloat16_impl::log(), m1, m2(), max, Eigen::numext::maxi(), Eigen::bfloat16_impl::pow(), Eigen::ArrayBase< Derived >::pow(), qr(), SYCL::sign(), size, STATIC_CHECK, Eigen::value, VERIFY_IS_APPROX, and VERIFY_IS_MUCH_SMALLER_THAN.

qr_verify_assert()

template<typename MatrixType >

void qr_verify_assert

(

)

                        {
  MatrixType tmp;
 
  HouseholderQR<MatrixType> qr;
  VERIFY_RAISES_ASSERT(qr.matrixQR())
  VERIFY_RAISES_ASSERT(qr.solve(tmp))
  VERIFY_RAISES_ASSERT(qr.transpose().solve(tmp))
  VERIFY_RAISES_ASSERT(qr.adjoint().solve(tmp))
  VERIFY_RAISES_ASSERT(qr.householderQ())
  VERIFY_RAISES_ASSERT(qr.determinant())
  VERIFY_RAISES_ASSERT(qr.absDeterminant())
  VERIFY_RAISES_ASSERT(qr.signDeterminant())
}

References qr(), tmp, and VERIFY_RAISES_ASSERT.