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add a info() function in LLT to report on succes/faillure

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This commit is contained in:
Gael Guennebaud 2010-06-12 10:12:22 +02:00
parent a25749ade9
commit 03331552a9
4 changed files with 30 additions and 10 deletions
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18
Eigen/src/Cholesky/LLT.h
View File

@ -150,6 +150,18 @@ template<typename _MatrixType, int _UpLo> class LLT
MatrixType reconstructedMatrix() const;
/** \brief Reports whether previous computation was successful.
*
* \returns \c Success if computation was succesful,
* \c NumericalIssue if the matrix.appears to be negative.
*/
ComputationInfo info() const
{
ei_assert(m_isInitialized && "LLT is not initialized.");
return m_info;
}
inline Index rows() const { return m_matrix.rows(); }
inline Index cols() const { return m_matrix.cols(); }
@ -160,6 +172,7 @@ template<typename _MatrixType, int _UpLo> class LLT
*/
MatrixType m_matrix;
bool m_isInitialized;
ComputationInfo m_info;
};
template<int UpLo> struct ei_llt_inplace;
@ -275,7 +288,10 @@ LLT<MatrixType,_UpLo>& LLT<MatrixType,_UpLo>::compute(const MatrixType& a)
m_matrix.resize(size, size);
m_matrix = a;
m_isInitialized = Traits::inplace_decomposition(m_matrix);
m_isInitialized = true;
bool ok = Traits::inplace_decomposition(m_matrix);
m_info = ok ? Success : NumericalIssue;
return *this;
}

8
Eigen/src/Core/util/Constants.h
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@ -234,6 +234,14 @@ enum {
IsSparse
};
/** \brief Enum for reporting the status of a computation.
*/
enum ComputationInfo {
Success = 0, /**< \brief Computation was successful. */
NumericalIssue = 1, /**< \brief The provided data did not satisfy the prerequisites. */
NoConvergence = 2 /**< \brief Iterative procedure did not converge. */
};
enum TransformTraits {
Isometry = 0x1,
Affine = 0x2,

10
Eigen/src/Eigenvalues/EigenvaluesCommon.h
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@ -25,15 +25,7 @@
#ifndef EIGEN_EIGENVALUES_COMMON_H
#define EIGEN_EIGENVALUES_COMMON_H
/** \eigenvalues_module \ingroup Eigenvalues_Module
* \nonstableyet
*
* \brief Enum for reporting the status of a computation.
*/
enum ComputationInfo {
Success = 0, /**< \brief Computation was successful. */
NoConvergence = 1 /**< \brief Iterative procedure did not converge. */
};
#endif // EIGEN_EIGENVALUES_COMMON_H

4
test/cholesky.cpp
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@ -119,6 +119,10 @@ template<typename MatrixType> void cholesky(const MatrixType& m)
VERIFY_IS_APPROX(symm * vecX, vecB);
matX = cholup.solve(matB);
VERIFY_IS_APPROX(symm * matX, matB);
MatrixType neg = -symmLo;
chollo.compute(neg);
VERIFY(chollo.info()==NumericalIssue);
}
// LDLT