vnl_rpoly_roots Class Reference

#include <vnl_rpoly_roots.h>

Collaboration diagram for vnl_rpoly_roots:

[legend]List of all members.

Public Methods
	vnl_rpoly_roots (const vnl_vector< double > &a)
	vnl_rpoly_roots (const vnl_real_polynomial &poly)
vcl_complex< double >	operator[] (int i) const
vnl_vector< vcl_complex< double > >	roots () const
const double &	real (int i) const
const double &	imag (int i) const
vnl_vector< double > &	real ()
vnl_vector< double > &	imag ()
vnl_vector< double >	realroots (double tol=1e-12) const
bool	compute ()
bool	compute_qr ()
bool	compute_laguerre ()
Protected Attributes
vnl_vector< double >	coeffs_
vnl_vector< double >	r_
vnl_vector< double >	i_
int	num_roots_found_

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Detailed Description

Roots of real polynomial.

Definition at line 35 of file vnl_rpoly_roots.h.

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Constructor & Destructor Documentation

vnl_rpoly_roots::vnl_rpoly_roots (  const vnl_vector< double > &    a )

The constructor calculates the roots.\ This is the most efficient interface. as all the result variables are initialized to the correct size. The polynomial is .

vnl_rpoly_roots::vnl_rpoly_roots (  const vnl_real_polynomial &    poly )

Calculate roots of RealPolynomial.

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Member Function Documentation

bool vnl_rpoly_roots::compute (    )

Compute roots using Jenkins-Traub algorithm.

bool vnl_rpoly_roots::compute_laguerre (    )

Compute roots using Laguerre algorithm.\ [unimplemented].

bool vnl_rpoly_roots::compute_qr (    )

Compute roots using QR decomposition of companion matrix.\ [unimplemented].

vnl_vector<double>& vnl_rpoly_roots::imag (    )  [inline]

Vector of imaginary parts of roots. Definition at line 74 of file vnl_rpoly_roots.h. References coeffs_, i_, num_roots_found_, and r_.

const double& vnl_rpoly_roots::imag (  int    i )  const [inline]

Imaginary part of root I. Definition at line 66 of file vnl_rpoly_roots.h.

vcl_complex<double> vnl_rpoly_roots::operator[] (  int    i )  const [inline]

Return i'th complex root. Definition at line 53 of file vnl_rpoly_roots.h. References r_.

vnl_vector<double>& vnl_rpoly_roots::real (    )  [inline]

Vector of real parts of roots. Definition at line 70 of file vnl_rpoly_roots.h.

const double& vnl_rpoly_roots::real (  int    i )  const [inline]

Real part of root I. Definition at line 62 of file vnl_rpoly_roots.h. References i_.

vnl_vector<double> vnl_rpoly_roots::realroots (  double    tol = 1e-12 )  const

Return real roots only.\ Roots are real if the absolute value. of their imaginary part is less than the optional argument TOL. TOL defaults to 1e-12 [untested]

vnl_vector<vcl_complex<double> > vnl_rpoly_roots::roots (    )  const

Complex vector of all roots.

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Member Data Documentation

vnl_vector<double> vnl_rpoly_roots::coeffs_ [protected]

Definition at line 102 of file vnl_rpoly_roots.h. Referenced by imag().

vnl_vector<double> vnl_rpoly_roots::i_ [protected]

Definition at line 105 of file vnl_rpoly_roots.h. Referenced by imag(), and real().

int vnl_rpoly_roots::num_roots_found_ [protected]

Definition at line 107 of file vnl_rpoly_roots.h. Referenced by imag().

vnl_vector<double> vnl_rpoly_roots::r_ [protected]

Definition at line 104 of file vnl_rpoly_roots.h. Referenced by imag(), and operator[]().

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

• vnl_rpoly_roots.h

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