LeastSquares2D Namespace Reference

Classes
struct	PolyCoeff

Typedefs
typedef std::vector< PolyCoeff >	PolyCoeffs

Functions
bool	getPoly (const vector< double > &x, const vector< double > &y, const vector< double > &w, PolyCoeffs &cfs)
bool	getPoly (const vector< double > &x, const vector< double > &y, PolyCoeffs &cfs)
double	calcPoly (const PolyCoeffs &coeffs, double x)
double	ls_m_elem (size_t i, size_t j, const vector< double > &x, const vector< double > &w)
double	ls_b_elem (size_t i, const vector< double > &x, const vector< double > &y, const vector< double > &w)

Detailed Description

Least squares. Functions return false if there is any error.

Typedef Documentation

typedef std::vector<PolyCoeff> LeastSquares2D::PolyCoeffs

Vector of coefficients

Function Documentation

double LeastSquares2D::calcPoly	(	const PolyCoeffs &	coeffs,
		double	x
	)

Calculates polynom with given coefficients for x.

bool LeastSquares2D::getPoly	(	const vector< double > &	x,
		const vector< double > &	y,
		const vector< double > &	w,
		PolyCoeffs &	cfs
	)

Calculates polynomial coefficients for provided nodes (x,y) and weights w. Vector of coefficients should be predefined by number of polynomial coefficients in the form of y = cfs[0] + cfs[1]*x + cfs[1]*x^2 + ... Sizes of x,y and w should be equal and <= than size of cfs. If any coefficients are fixed, its values will be preserved after calculation. Return false on error.

bool LeastSquares2D::getPoly	(	const vector< double > &	x,
		const vector< double > &	y,
		PolyCoeffs &	cfs
	)

The same as above but without weights.