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nr::powell< TraitsT > Struct Template Reference

#include <powell.h>

List of all members.

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Detailed Description

template<class TraitsT = Old_Traits<>>
struct nr::powell< TraitsT >

Minimization of an n-dimensional function, without information on gradient.

The constructor performs the minimization.

Examples:

optimization_N_test.cpp.

Definition at line 15 of file powell.h.

Public Types
typedef TraitsT	Traits
	Traits.
typedef Traits::Real	Real
	Floating point value.
typedef Traits::Vector	Vector
	Vector.
typedef Traits::Matrix	Matrix
	Matrix.
Public Member Functions
Constructor
template<class Func>	powell (Vector &p, Matrix &xi, unsigned int n, Real ftol, unsigned int *iter, Real *fret, Func(*func), unsigned int ITMAX=200)
	Input consists of an initial starting point p[0..n-1]; an initial matrix xi[0..n-1][o..n-1], whose columns contain the initial set of directions (usually the n unit vectors); and ftol, the fractional tolerance in the function value such that failure to decrease by more than this amount on one iteration signals doneness.
template<class Func>	powell (Vector &p, unsigned int n, Real ftol, unsigned int *iter, Real *fret, Func(*func), unsigned int ITMAX=200)
	Same as previous, using identity matrix as an intial set of directions.

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Member Typedef Documentation

template<class TraitsT = Old_Traits<>> typedef Traits::Matrix nr::powell< TraitsT >::Matrix

Matrix. Definition at line 24 of file powell.h. Referenced by nr::powell< TraitsT >::powell().

template<class TraitsT = Old_Traits<>> typedef Traits::Real nr::powell< TraitsT >::Real

Floating point value. Definition at line 20 of file powell.h.

template<class TraitsT = Old_Traits<>> typedef TraitsT nr::powell< TraitsT >::Traits

Traits. Definition at line 18 of file powell.h.

template<class TraitsT = Old_Traits<>> typedef Traits::Vector nr::powell< TraitsT >::Vector

Vector. Definition at line 22 of file powell.h.

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Constructor & Destructor Documentation

template<class TraitsT = Old_Traits<>> template<class Func> nr::powell< TraitsT >::powell (  Vector &  p, Matrix &  xi, unsigned int  n, Real  ftol, unsigned int *  iter, Real *  fret, Func *  func, unsigned int  ITMAX = 200 )  [inline]

Input consists of an initial starting point p[0..n-1]; an initial matrix xi[0..n-1][o..n-1], whose columns contain the initial set of directions (usually the n unit vectors); and ftol, the fractional tolerance in the function value such that failure to decrease by more than this amount on one iteration signals doneness. On output, p is set to the best point found, xi is the then-current direction set, fret is the returned function value at p, and iter is the number of iterations taken. The routine linmin is used. Template Func must be similar with Real( Vector ) Definition at line 34 of file powell.h. References nr::powell< TraitsT >::Matrix, and nr::SQR(). Referenced by nr::powell< TraitsT >::powell().

template<class TraitsT = Old_Traits<>> template<class Func> nr::powell< TraitsT >::powell (  Vector &  p, unsigned int  n, Real  ftol, unsigned int *  iter, Real *  fret, Func *  func, unsigned int  ITMAX = 200 )  [inline]

Same as previous, using identity matrix as an intial set of directions. Definition at line 100 of file powell.h. References nr::powell< TraitsT >::Matrix, and nr::powell< TraitsT >::powell().

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

• powell.h

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