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Make MatrixPowerTriangularAtomic::computePade static because it should be.

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This commit is contained in:
Chen-Pang He
2012-10-07 02:25:00 +08:00
parent a5d348e30a
commit 0017d8c58f
2 changed files with 13 additions and 19 deletions
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20
unsupported/Eigen/src/MatrixFunctions/MatrixPowerBase.h
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@@ -25,7 +25,6 @@ namespace Eigen {
#define EIGEN_MATRIX_POWER_PROTECTED_MEMBERS(Derived) \
using Base::m_A; \
using Base::m_Id; \
using Base::m_tmp1; \
using Base::m_tmp2; \
using Base::m_conditionNumber;
@@ -77,7 +76,6 @@ class MatrixPowerBase
explicit MatrixPowerBase(const MatrixType& A) :
m_A(A),
m_Id(MatrixType::Identity(A.rows(), A.cols())),
m_conditionNumber(0)
{ eigen_assert(A.rows() == A.cols()); }
@@ -100,7 +98,6 @@ class MatrixPowerBase
typedef Array<RealScalar,RowsAtCompileTime,1,ColMajor,MaxRowsAtCompileTime> RealArray;
const MatrixType& m_A;
const MatrixType m_Id;
MatrixType m_tmp1, m_tmp2;
RealScalar m_conditionNumber;
};
@@ -286,9 +283,8 @@ class MatrixPowerTriangularAtomic
typedef Array<Scalar,RowsAtCompileTime,1,ColMajor,MaxRowsAtCompileTime> ArrayType;
const MatrixType& m_A;
const MatrixType m_Id;
void computePade(int degree, const MatrixType& IminusT, MatrixType& res, RealScalar p) const;
static void computePade(int degree, const MatrixType& IminusT, MatrixType& res, RealScalar p);
void compute2x2(MatrixType& res, RealScalar p) const;
void computeBig(MatrixType& res, RealScalar p) const;
@@ -299,8 +295,7 @@ class MatrixPowerTriangularAtomic
template<typename MatrixType>
MatrixPowerTriangularAtomic<MatrixType>::MatrixPowerTriangularAtomic(const MatrixType& T) :
m_A(T),
m_Id(MatrixType::Identity(T.rows(), T.cols()))
m_A(T)
{ eigen_assert(T.rows() == T.cols()); }
template<typename MatrixType>
@@ -321,16 +316,15 @@ void MatrixPowerTriangularAtomic<MatrixType>::compute(MatrixType& res, RealScala
}
template<typename MatrixType>
void MatrixPowerTriangularAtomic<MatrixType>::computePade(int degree, const MatrixType& IminusT, MatrixType& res,
RealScalar p) const
void MatrixPowerTriangularAtomic<MatrixType>::computePade(int degree, const MatrixType& IminusT, MatrixType& res, RealScalar p)
{
int i = degree<<1;
res = (p-degree) / ((i-1)<<1) * IminusT;
for (--i; i; --i) {
res = (m_Id + res).template triangularView<Upper>().solve((i==1 ? -p : i&1 ? (-p-(i>>1))/(i<<1) :
(p-(i>>1))/((i-1)<<1)) * IminusT).eval();
res = (MatrixType::Identity(IminusT.rows(), IminusT.cols()) + res).template triangularView<Upper>()
.solve((i==1 ? -p : i&1 ? (-p-(i>>1))/(i<<1) : (p-(i>>1))/((i-1)<<1)) * IminusT).eval();
}
res += m_Id;
res += MatrixType::Identity(IminusT.rows(), IminusT.cols());
}
template<typename MatrixType>
@@ -374,7 +368,7 @@ void MatrixPowerTriangularAtomic<MatrixType>::computeBig(MatrixType& res, RealSc
bool hasExtraSquareRoot = false;
while (true) {
IminusT = m_Id - T;
IminusT = MatrixType::Identity(m_A.rows(), m_A.cols()) - T;
normIminusT = IminusT.cwiseAbs().colwise().sum().maxCoeff();
if (normIminusT < maxNormForPade) {
degree = internal::matrix_power_get_pade_degree(normIminusT);