vnl_real_polynomial Class Reference

#include <vnl_real_polynomial.h>

Collaboration diagram for vnl_real_polynomial:

[legend]List of all members.

Public Methods
	vnl_real_polynomial (vnl_vector< double > const &a)
	vnl_real_polynomial (double const *a, int len)
	vnl_real_polynomial (int d)
double	evaluate (double x) const
vcl_complex< double >	evaluate (vcl_complex< double > const &x) const
vcl_complex< double >	devaluate (vcl_complex< double > const &x) const
int	degree () const
double &	operator[] (int i)
double	operator[] (int i) const
const vnl_vector< double > &	coefficients () const
vnl_vector< double > &	coefficients ()
void	set_coefficients (const vnl_vector< double > &coeffs)
Protected Attributes
vnl_vector< double >	coeffs_

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Detailed Description

Evaluation of real polynomials at real and complex points. vnl_real_polynomial represents a univariate polynomial with real coefficients, stored as a vector of doubles. This allows evaluation of the polynomial at given values of , or of its derivative .

Roots may be extracted using the roots() method.

Definition at line 31 of file vnl_real_polynomial.h.

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Constructor & Destructor Documentation

vnl_real_polynomial::vnl_real_polynomial (  vnl_vector< double > const &    a )  [inline]

Initialize polynomial. The polynomial is . Definition at line 36 of file vnl_real_polynomial.h. References coeffs_.

vnl_real_polynomial::vnl_real_polynomial (  double const *    a, int    len )  [inline]

Initialize polynomial from C vector. The parameter len is the number of coefficients, one greater than the degree. Definition at line 42 of file vnl_real_polynomial.h.

vnl_real_polynomial::vnl_real_polynomial (  int    d )  [inline]

Initialize polynomial of a given degree. Definition at line 46 of file vnl_real_polynomial.h. References coeffs_, and vnl_vector< double >::size().

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Member Function Documentation

vnl_vector<double>& vnl_real_polynomial::coefficients (    )  [inline]

Return the vector of coefficients. Definition at line 86 of file vnl_real_polynomial.h.

const vnl_vector<double>& vnl_real_polynomial::coefficients (    )  const [inline]

Return the vector of coefficients. Definition at line 83 of file vnl_real_polynomial.h.

int vnl_real_polynomial::degree (    )  const [inline]

Return the degree (highest power of x) of the polynomial. Definition at line 72 of file vnl_real_polynomial.h. References coeffs_.

vcl_complex<double> vnl_real_polynomial::devaluate (  vcl_complex< double > const &    x )  const

Evaluate derivative at complex value x.

vcl_complex<double> vnl_real_polynomial::evaluate (  vcl_complex< double > const &    x )  const

Evaluate polynomial at complex value x.

double vnl_real_polynomial::evaluate (  double    x )  const

Evaluate polynomial at value x.

double vnl_real_polynomial::operator[] (  int    i )  const [inline]

Access to the polynomial coefficients. Definition at line 79 of file vnl_real_polynomial.h. References coeffs_.

double& vnl_real_polynomial::operator[] (  int    i )  [inline]

Access to the polynomial coefficients. Definition at line 76 of file vnl_real_polynomial.h.

void vnl_real_polynomial::set_coefficients (  const vnl_vector< double > &    coeffs )  [inline]

Definition at line 88 of file vnl_real_polynomial.h.

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Member Data Documentation

vnl_vector<double> vnl_real_polynomial::coeffs_ [protected]

The coefficients of the polynomial. coeffs_[0] is the const term. coeffs_[n] is the coefficient of the x^n term. Definition at line 97 of file vnl_real_polynomial.h. Referenced by degree(), operator[](), and vnl_real_polynomial().

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

• vnl_real_polynomial.h

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