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Bugfix in MatrixLogarithm.h

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This commit is contained in:
jdh8
2012-08-18 21:28:05 +08:00
parent f047030104 42c1b9a8dd
commit 15dabd4db7
5 changed files with 32 additions and 29 deletions
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23
unsupported/Eigen/src/MatrixFunctions/MatrixLogarithm.h
View File

@@ -173,10 +173,11 @@ int MatrixLogarithmAtomic<MatrixType>::getPadeDegree(float normTminusI)
{
const float maxNormForPade[] = { 2.5111573934555054e-1 /* degree = 3 */ , 4.0535837411880493e-1,
5.3149729967117310e-1 };
for (int degree = 3; degree <= maxPadeDegree; ++degree)
int degree = 3;
for (; degree <= maxPadeDegree; ++degree)
if (normTminusI <= maxNormForPade[degree - minPadeDegree])
return degree;
assert(false); // this line should never be reached
break;
return degree;
}
/* \brief Get suitable degree for Pade approximation. (specialized for RealScalar = double) */
@@ -185,10 +186,11 @@ int MatrixLogarithmAtomic<MatrixType>::getPadeDegree(double normTminusI)
{
const double maxNormForPade[] = { 1.6206284795015624e-2 /* degree = 3 */ , 5.3873532631381171e-2,
1.1352802267628681e-1, 1.8662860613541288e-1, 2.642960831111435e-1 };
for (int degree = 3; degree <= maxPadeDegree; ++degree)
int degree = 3;
for (; degree <= maxPadeDegree; ++degree)
if (normTminusI <= maxNormForPade[degree - minPadeDegree])
return degree;
assert(false); // this line should never be reached
break;
return degree;
}
/* \brief Get suitable degree for Pade approximation. (specialized for RealScalar = long double) */
@@ -215,10 +217,11 @@ int MatrixLogarithmAtomic<MatrixType>::getPadeDegree(long double normTminusI)
3.6688019729653446926585242192447447e-2L, 5.9290962294020186998954055264528393e-2L,
8.6998436081634343903250580992127677e-2L, 1.1880960220216759245467951592883642e-1L };
#endif
for (int degree = 3; degree <= maxPadeDegree; ++degree)
int degree = 3
for (; degree <= maxPadeDegree; ++degree)
if (normTminusI <= maxNormForPade[degree - minPadeDegree])
return degree;
assert(false); // this line should never be reached
break;
return degree;
}
/* \brief Compute Pade approximation to matrix logarithm */
@@ -424,7 +427,7 @@ void MatrixLogarithmAtomic<MatrixType>::computePade11(MatrixType& result, const
* This class holds the argument to the matrix function until it is
* assigned or evaluated for some other reason (so the argument
* should not be changed in the meantime). It is the return type of
* matrixBase::log() and most of the time this is the only way it
* MatrixBase::log() and most of the time this is the only way it
* is used.
*/
template<typename Derived> class MatrixLogarithmReturnValue

24
unsupported/Eigen/src/MatrixFunctions/MatrixPower.h
View File

@@ -462,11 +462,11 @@ template <typename MatrixType, typename RealScalar, typename PlainObject, int Is
inline int MatrixPower<MatrixType,RealScalar,PlainObject,IsInteger>::getPadeDegree(float normIminusT)
{
const float maxNormForPade[] = { 2.7996156e-1f /* degree = 3 */ , 4.3268868e-1f };
for (int degree = 3; degree <= 4; degree++)
int degree = 3;
for (; degree <= 4; degree++)
if (normIminusT <= maxNormForPade[degree - 3])
return degree;
assert(false); // this line should never be reached
break;
return degree;
}
template <typename MatrixType, typename RealScalar, typename PlainObject, int IsInteger>
@@ -474,11 +474,11 @@ inline int MatrixPower<MatrixType,RealScalar,PlainObject,IsInteger>::getPadeDegr
{
const double maxNormForPade[] = { 1.882832775783710e-2 /* degree = 3 */ , 6.036100693089536e-2,
1.239372725584857e-1, 1.998030690604104e-1, 2.787629930861592e-1 };
for (int degree = 3; degree <= 7; degree++)
int degree = 3;
for (; degree <= 7; degree++)
if (normIminusT <= maxNormForPade[degree - 3])
return degree;
assert(false); // this line should never be reached
break;
return degree;
}
template <typename MatrixType, typename RealScalar, typename PlainObject, int IsInteger>
@@ -508,11 +508,11 @@ inline int MatrixPower<MatrixType,RealScalar,PlainObject,IsInteger>::getPadeDegr
3.907876732697568523164749432441966e-2L, 6.266303975524852476985111609267074e-2L,
9.133823549851655878933476070874651e-2L };
#endif
for (int degree = 3; degree <= maxPadeDegree; degree++)
int degree = 3;
for (; degree <= maxPadeDegree; degree++)
if (normIminusT <= maxNormForPade[degree - 3])
return degree;
assert(false); // this line should never be reached
break;
return degree;
}
template <typename MatrixType, typename RealScalar, typename PlainObject, int IsInteger>
void MatrixPower<MatrixType,RealScalar,PlainObject,IsInteger>::computePade(const int& degree, const ComplexMatrix& IminusT)