GitHub-Proxy/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2025-05-02 08:44:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

Remove LM::sqrt_() member function in favor of a shortcut for sqrt(epsilon())

Browse Source
This commit is contained in:
Gael Guennebaud 2014-09-02 17:29:06 +02:00
parent ff9bfc45f7
commit 280661e67d
1 changed files with 12 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
unsupported/Eigen/src/NonLinearOptimization/LevenbergMarquardt.h
View File

@ -45,18 +45,24 @@ namespace LevenbergMarquardtSpace {
template<typename FunctorType, typename Scalar=double>
class LevenbergMarquardt
{
static Scalar sqrt_epsilon()
{
using std::sqrt;
return sqrt(NumTraits<Scalar>::epsilon());
}
public:
LevenbergMarquardt(FunctorType &_functor)
: functor(_functor) { nfev = njev = iter = 0; fnorm = gnorm = 0.; useExternalScaling=false; }
typedef DenseIndex Index;
struct Parameters {
Parameters()
: factor(Scalar(100.))
, maxfev(400)
, ftol(sqrt_(NumTraits<Scalar>::epsilon()))
, xtol(sqrt_(NumTraits<Scalar>::epsilon()))
, ftol(sqrt_epsilon())
, xtol(sqrt_epsilon())
, gtol(Scalar(0.))
, epsfcn(Scalar(0.)) {}
Scalar factor;
@ -72,7 +78,7 @@ public:
LevenbergMarquardtSpace::Status lmder1(
FVectorType &x,
const Scalar tol = sqrt_(NumTraits<Scalar>::epsilon())
const Scalar tol = sqrt_epsilon()
);
LevenbergMarquardtSpace::Status minimize(FVectorType &x);
@ -83,12 +89,12 @@ public:
FunctorType &functor,
FVectorType &x,
Index *nfev,
const Scalar tol = sqrt_(NumTraits<Scalar>::epsilon())
const Scalar tol = sqrt_epsilon()
);
LevenbergMarquardtSpace::Status lmstr1(
FVectorType &x,
const Scalar tol = sqrt_(NumTraits<Scalar>::epsilon())
const Scalar tol = sqrt_epsilon()
);
LevenbergMarquardtSpace::Status minimizeOptimumStorage(FVectorType &x);
@ -109,7 +115,6 @@ public:
Scalar lm_param(void) { return par; }
private:
static Scalar sqrt_(const Scalar& x) { using std::sqrt; return sqrt(x); }
FunctorType &functor;
Index n;