ROL
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ROL::ScalarMinimizationLineSearch< Real > Class Template Reference

Implements line search methods that attempt to minimize the scalar function \(\phi(t) := f(x+ts)\). More...

#include <ROL_ScalarMinimizationLineSearch.hpp>

+ Inheritance diagram for ROL::ScalarMinimizationLineSearch< Real >:

Classes

class  LineSearchStatusTest
 
class  Phi
 

Public Member Functions

 ScalarMinimizationLineSearch (ROL::ParameterList &parlist, const ROL::Ptr< ScalarMinimization< Real > > &sm=ROL::nullPtr, const ROL::Ptr< Bracketing< Real > > &br=ROL::nullPtr, const ROL::Ptr< ScalarFunction< Real > > &sf=ROL::nullPtr)
 
void initialize (const Vector< Real > &x, const Vector< Real > &s, const Vector< Real > &g, Objective< Real > &obj, BoundConstraint< Real > &con)
 
void run (Real &alpha, Real &fval, int &ls_neval, int &ls_ngrad, const Real &gs, const Vector< Real > &s, const Vector< Real > &x, Objective< Real > &obj, BoundConstraint< Real > &con)
 
- Public Member Functions inherited from ROL::LineSearch< Real >
virtual ~LineSearch ()
 
 LineSearch (ROL::ParameterList &parlist)
 
void setData (Real &eps, const Vector< Real > &g)
 
void setMaxitUpdate (Real &alpha, Real &fnew, const Real &fold)
 

Private Attributes

ROL::Ptr< Vector< Real > > xnew_
 
ROL::Ptr< Vector< Real > > g_
 
ROL::Ptr< ScalarMinimization
< Real > > 		sm_
 
ROL::Ptr< Bracketing< Real > > br_
 
ROL::Ptr< ScalarFunction< Real > > sf_
 
ECurvatureCondition econd_
 
Real c1_
 
Real c2_
 
Real c3_
 
int max_nfval_
 

Additional Inherited Members

- Protected Member Functions inherited from ROL::LineSearch< Real >
virtual bool status (const ELineSearch type, int &ls_neval, int &ls_ngrad, const Real alpha, const Real fold, const Real sgold, const Real fnew, const Vector< Real > &x, const Vector< Real > &s, Objective< Real > &obj, BoundConstraint< Real > &con)
 
virtual Real getInitialAlpha (int &ls_neval, int &ls_ngrad, const Real fval, const Real gs, const Vector< Real > &x, const Vector< Real > &s, Objective< Real > &obj, BoundConstraint< Real > &con)
 
void setNextInitialAlpha (Real alpha)
 
void updateIterate (Vector< Real > &xnew, const Vector< Real > &x, const Vector< Real > &s, Real alpha, BoundConstraint< Real > &con)
 
bool useLocalMinimizer ()
 
bool takeNoStep ()
 

Detailed Description

template<class Real>
class ROL::ScalarMinimizationLineSearch< Real >

Implements line search methods that attempt to minimize the scalar function \(\phi(t) := f(x+ts)\).

Definition at line 62 of file ROL_ScalarMinimizationLineSearch.hpp.

Constructor & Destructor Documentation

template<class Real >
ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch ( ROL::ParameterList &  parlist,
const ROL::Ptr< ScalarMinimization< Real > > &  sm = ROL::nullPtr,
const ROL::Ptr< Bracketing< Real > > &  br = ROL::nullPtr,
const ROL::Ptr< ScalarFunction< Real > > &  sf = ROL::nullPtr 
)
inline

Definition at line 175 of file ROL_ScalarMinimizationLineSearch.hpp.

References ROL::ScalarMinimizationLineSearch< Real >::br_, ROL::ScalarMinimizationLineSearch< Real >::c1_, ROL::ScalarMinimizationLineSearch< Real >::c2_, ROL::ScalarMinimizationLineSearch< Real >::c3_, ROL::DESCENT_NONLINEARCG, ROL::ScalarMinimizationLineSearch< Real >::econd_, ROL::ScalarMinimizationLineSearch< Real >::max_nfval_, ROL::ScalarMinimizationLineSearch< Real >::sf_, ROL::ScalarMinimizationLineSearch< Real >::sm_, ROL::StringToECurvatureCondition(), ROL::StringToEDescent(), and zero.

Member Function Documentation

template<class Real >
void ROL::ScalarMinimizationLineSearch< Real >::initialize ( const Vector< Real > &  x,
const Vector< Real > &  s,
const Vector< Real > &  g,
Objective< Real > &  obj,
BoundConstraint< Real > &  con 
)
inlinevirtual

Reimplemented from ROL::LineSearch< Real >.

Definition at line 243 of file ROL_ScalarMinimizationLineSearch.hpp.

References ROL::Vector< Real >::clone(), ROL::ScalarMinimizationLineSearch< Real >::g_, ROL::LineSearch< Real >::initialize(), and ROL::ScalarMinimizationLineSearch< Real >::xnew_.

template<class Real >
void ROL::ScalarMinimizationLineSearch< Real >::run ( Real &  alpha,
Real &  fval,
int &  ls_neval,
int &  ls_ngrad,
const Real &  gs,
const Vector< Real > &  s,
const Vector< Real > &  x,
Objective< Real > &  obj,
BoundConstraint< Real > &  con 
)
inlinevirtual

Implements ROL::LineSearch< Real >.

Definition at line 251 of file ROL_ScalarMinimizationLineSearch.hpp.

References ROL::ScalarMinimizationLineSearch< Real >::br_, ROL::ScalarMinimizationLineSearch< Real >::c1_, ROL::ScalarMinimizationLineSearch< Real >::c2_, ROL::ScalarMinimizationLineSearch< Real >::c3_, ROL::ScalarMinimizationLineSearch< Real >::econd_, ROL::ScalarMinimizationLineSearch< Real >::g_, ROL::LineSearch< Real >::getInitialAlpha(), ROL::ScalarMinimizationLineSearch< Real >::max_nfval_, ROL::LineSearch< Real >::setNextInitialAlpha(), ROL::ScalarMinimizationLineSearch< Real >::sf_, ROL::ScalarMinimizationLineSearch< Real >::sm_, and ROL::ScalarMinimizationLineSearch< Real >::xnew_.

Member Data Documentation

template<class Real >
ROL::Ptr<Vector<Real> > ROL::ScalarMinimizationLineSearch< Real >::xnew_
private

Definition at line 64 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::initialize(), and ROL::ScalarMinimizationLineSearch< Real >::run().

template<class Real >
ROL::Ptr<Vector<Real> > ROL::ScalarMinimizationLineSearch< Real >::g_
private

Definition at line 65 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::initialize(), and ROL::ScalarMinimizationLineSearch< Real >::run().

template<class Real >
ROL::Ptr<ScalarMinimization<Real> > ROL::ScalarMinimizationLineSearch< Real >::sm_
private

Definition at line 66 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

template<class Real >
ROL::Ptr<Bracketing<Real> > ROL::ScalarMinimizationLineSearch< Real >::br_
private

Definition at line 67 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

template<class Real >
ROL::Ptr<ScalarFunction<Real> > ROL::ScalarMinimizationLineSearch< Real >::sf_
private

Definition at line 68 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

template<class Real >
ECurvatureCondition ROL::ScalarMinimizationLineSearch< Real >::econd_
private

Definition at line 70 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

template<class Real >
Real ROL::ScalarMinimizationLineSearch< Real >::c1_
private

Definition at line 71 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

template<class Real >
Real ROL::ScalarMinimizationLineSearch< Real >::c2_
private

Definition at line 72 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

template<class Real >
Real ROL::ScalarMinimizationLineSearch< Real >::c3_
private

Definition at line 73 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

template<class Real >
int ROL::ScalarMinimizationLineSearch< Real >::max_nfval_
private

Definition at line 74 of file ROL_ScalarMinimizationLineSearch.hpp.

Referenced by ROL::ScalarMinimizationLineSearch< Real >::run(), and ROL::ScalarMinimizationLineSearch< Real >::ScalarMinimizationLineSearch().

The documentation for this class was generated from the following file:
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