PolyFit Class Template Reference
[Mathematical algorithms]

#include <PolyFit.hpp>

Inheritance diagram for PolyFit:

[legend]List of all members.

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Detailed Description

template<class T>
class gpstk::PolyFit< T >

Compute a polynomial fit of the form sum[X(i)*t**i] = d, that is solve for coefficients X given a set of data pairs (t,d).

The dimension of X is n, the degree of the polynomial.

 unsigned int i,n=4;
 double dat[17]={...}, times[17]={...};
 PolyFit<double> PF(n);
 for(i=0; i<17; i++)
    PF.Add(dat[i],times[i]);
 
 cout << "Solution vector: " << PF.Solution() << endl;
 cout << "Covariance matrix: " << PF.Covariance() << endl;
 for(i=0; i<17; i++)
    cout << times[i] << " " << dat[i] << " " << PF.Evaluate(times[i]) << endl;

Definition at line 79 of file PolyFit.hpp.

Public Member Functions
	PolyFit ()
	Empty constructor.
	PolyFit (unsigned int n)
	Constructor given an initial size.
void	Reset (unsigned int n=0)
	Reset the estimation, i.e.
void	Add (T d, T t, T w=T(1))
	Add a single (optional: weighted) datum to the estimation.
void	Add (const Vector< T > &d, const Vector< T > &t)
	Add a gpstk::Vector of data to the estimation.
void	Add (const std::vector< T > &d, const std::vector< T > &t)
	Add a std::vector of data to the estimation.
T	Evaluate (T t)
	Evaluate the polynomial at the given time; singular problems return zero.
Vector< T >	Evaluate (const Vector< T > &Vt)
	Evaluate the polynomial at a Vector of times; singular problems return an empty vector.
bool	isSingular (void)
	is the problem singular?
Vector< T >	Solution (void)
	get the solution vector (coefficients)
Matrix< T >	Covariance (void)
	get the covariance matrix
unsigned int	Degree (void) const
	get the degree of the polynomial
unsigned int	N (void) const
	get the number of data points processed

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Constructor & Destructor Documentation

PolyFit (   )  [inline]

Empty constructor. Definition at line 83 of file PolyFit.hpp.

PolyFit (  unsigned int  n  )  [inline]

Constructor given an initial size. Definition at line 86 of file PolyFit.hpp.

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Member Function Documentation

void Add (  const std::vector< T > &  d, const std::vector< T > &  t )  [inline]

Add a std::vector of data to the estimation. Definition at line 158 of file PolyFit.hpp.

void Add (  const Vector< T > &  d, const Vector< T > &  t )  [inline]

Add a gpstk::Vector of data to the estimation. Definition at line 135 of file PolyFit.hpp.

void Add (  T  d, T  t, T  w = T(1) )  [inline]

Add a single (optional: weighted) datum to the estimation. Definition at line 116 of file PolyFit.hpp. Referenced by GDCPass::EstimateGFslipFix(), PolyTest(), and GDCPass::prepareGFdata().

Matrix<T> Covariance (  void   )  [inline]

get the covariance matrix Definition at line 225 of file PolyFit.hpp. Referenced by PolyTest().

unsigned int Degree (  void   )  const [inline]

get the degree of the polynomial Definition at line 227 of file PolyFit.hpp.

Vector<T> Evaluate (  const Vector< T > &  Vt  )  [inline]

Evaluate the polynomial at a Vector of times; singular problems return an empty vector. Definition at line 200 of file PolyFit.hpp.

T Evaluate (  T  t  )  [inline]

Evaluate the polynomial at the given time; singular problems return zero. Definition at line 182 of file PolyFit.hpp. Referenced by GDCPass::EstimateGFslipFix(), and PolyTest().

bool isSingular (  void   )  [inline]

is the problem singular? Definition at line 221 of file PolyFit.hpp. Referenced by GDCPass::prepareGFdata().

unsigned int N (  void   )  const [inline]

get the number of data points processed Definition at line 229 of file PolyFit.hpp. Referenced by GDCPass::EstimateGFslipFix().

void Reset (  unsigned int  n = 0  )  [inline]

Reset the estimation, i.e. restart with new data, with new dimension. Default dimension is 0, meaning do not change dimension. Definition at line 97 of file PolyFit.hpp. Referenced by GDCPass::EstimateGFslipFix(), PolyTest(), and GDCPass::prepareGFdata().

Vector<T> Solution (  void   )  [inline]

get the solution vector (coefficients) Definition at line 223 of file PolyFit.hpp. Referenced by PolyTest().

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

• PolyFit.hpp

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