Isis 3.0: Isis::Parabola Class Reference

Isis 3.0

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Parabola basis function. More...

#include <Parabola.h>

Inherits Isis::BasisFunction.

Public Member Functions
	Parabola (const QString &bname="Parabola")
	Create a Parabola object. More...

	~Parabola ()
	Destroys the Parabola object. More...

void	Expand (const std::vector< double > &vars)
	This is the the overriding virtual function that provides the expansion into the parabolic equation. More...

void	SetCoefficients (const std::vector< double > &coefs)
	Set the coefficients for the equation. More...

double	Evaluate (const std::vector< double > &vars)
	Compute the equation using the input variables. More...

double	Evaluate (const double &var)
	Compute the equation using the input variable. More...

int	Coefficients () const
	Returns the number of coefficients for the equation. More...

int	Variables () const
	Returns the number of variables in the equation. More...

QString	Name () const
	Returns the name of the equation. More...

double	Term (int c) const
	Returns the cth term. More...

double	Coefficient (int i) const
	Returns the ith coefficient. More...

Protected Attributes
QString	p_name
	The name of the equation. Call it by using Name() More...

int	p_numVars
	The number of variables in the equation. Call it by using Variables() More...

int	p_numCoefs
	The number of coefficients in the equation. More...

std::vector< double >	p_coefs
	A vector of the coefficients in the equation. More...

std::vector< double >	p_terms
	A vector of the terms in the equation. More...

Detailed Description

Parabola basis function.

This is a derived class from the BasisFunction class which creates a parabola (second degree equation in 1 variable). The parabolic function has the following form:

$x = A + B*y + C*y**2$

Author: 2005-06-09 Kris Becker

Constructor & Destructor Documentation

Isis::Parabola::Parabola ( const QString & bname = "Parabola" )

inline

Create a Parabola object.

Isis::Parabola::~Parabola ( )

inline

Destroys the Parabola object.

Member Function Documentation

double Isis::BasisFunction::Coefficient ( int i ) const

inlineinherited

Returns the ith coefficient.

Parameters

i	The index for the desired coefficient.

Returns: The ith coefficient

References Isis::BasisFunction::p_coefs.

Referenced by Isis::PolynomialUnivariate::DerivativeVar(), Isis::SpicePosition::LoadHermiteCache(), Isis::SurfaceModel::MinMax(), Isis::SpicePosition::SetPolynomial(), Isis::SpiceRotation::SetPolynomial(), and Isis::Affine::Solve().

int Isis::BasisFunction::Coefficients ( ) const

inlineinherited

Returns the number of coefficients for the equation.

Returns: The number of coefficients.

References Isis::BasisFunction::p_numCoefs.

Referenced by Isis::PolynomialUnivariate::DerivativeCoef(), Isis::PolynomialUnivariate::DerivativeVar(), Isis::SpicePosition::SetPolynomial(), and Isis::SpiceRotation::SetPolynomial().

double Isis::BasisFunction::Evaluate ( const std::vector< double > & vars )

inherited

Compute the equation using the input variables.

Parameters

vars	A vector of double values to use for the equation. After setting the coefficients, this can be invoked many times to compute output values given input values.

Returns: The output value.

References _FILEINFO_, Isis::BasisFunction::Expand(), Isis::BasisFunction::p_coefs, Isis::BasisFunction::p_numCoefs, Isis::BasisFunction::p_numVars, Isis::BasisFunction::p_terms, Isis::IException::Programmer, and Isis::toString().

Referenced by Isis::BasisFunction::Evaluate(), Isis::LeastSquares::Evaluate(), Isis::SpiceRotation::EvaluatePolyFunction(), Isis::SpicePosition::LoadHermiteCache(), Isis::SpicePosition::SetEphemerisTimePolyFunction(), and Isis::SpiceRotation::setEphemerisTimePolyFunction().

double Isis::BasisFunction::Evaluate ( const double & var )

inherited

Compute the equation using the input variable.

Parameters

var	A single double value to use for the equation.

Returns: The output double value resulting from the equation.

References Isis::BasisFunction::Evaluate().

void Isis::Parabola::Expand ( const std::vector< double > & vars )

virtual

This is the the overriding virtual function that provides the expansion into the parabolic equation.

See BasisFunction for more information.

Parameters

vars	A vector of double values to use for the expansion.

Reimplemented from Isis::BasisFunction.

References Isis::BasisFunction::p_terms, and Isis::BasisFunction::Variables().

QString Isis::BasisFunction::Name ( ) const

inlineinherited

Returns the name of the equation.

Returns: The name of the equation.

References Isis::BasisFunction::p_name.

Referenced by Isis::LeastSquares::AddKnown().

void Isis::BasisFunction::SetCoefficients ( const std::vector< double > & coefs )

inherited

Set the coefficients for the equation.

Parameters

coefs A vector of coefficients for the equation.

References _FILEINFO_, Isis::BasisFunction::p_coefs, Isis::BasisFunction::p_numCoefs, Isis::IException::Programmer, and Isis::toString().

Referenced by Isis::SpiceRotation::DCJdt(), Isis::SpiceRotation::EvaluatePolyFunction(), Isis::SpicePosition::LoadHermiteCache(), Isis::SpicePosition::SetEphemerisTimePolyFunction(), Isis::SpiceRotation::setEphemerisTimePolyFunction(), Isis::SpicePosition::SetPolynomial(), and Isis::SpiceRotation::SetPolynomial().

double Isis::BasisFunction::Term ( int c ) const

inlineinherited

Returns the cth term.

This is only valid after a Evalute/Expand has been invoked. It represents the expansion of the variables into the ith term. For example,

$x = C1 + C2*x + C3*y + C4*x*y$

would return x*y for the 3rd term (zero-based)

Parameters

c	The index for the desired coefficient.

Returns: The cth term.

References Isis::BasisFunction::p_terms.

int Isis::BasisFunction::Variables ( ) const

inlineinherited

Returns the number of variables in the equation.

Returns: The number of variables.

References Isis::BasisFunction::p_numVars.

Referenced by Isis::LeastSquares::AddKnown(), and Expand().

Member Data Documentation

std::vector<double> Isis::BasisFunction::p_coefs

protectedinherited

A vector of the coefficients in the equation.

Call it by using Coefficient()

Referenced by Isis::BasisFunction::Coefficient(), Isis::BasisFunction::Evaluate(), and Isis::BasisFunction::SetCoefficients().

QString Isis::BasisFunction::p_name

protectedinherited

The name of the equation. Call it by using Name()

Referenced by Isis::BasisFunction::BasisFunction(), and Isis::BasisFunction::Name().

int Isis::BasisFunction::p_numCoefs

protectedinherited

The number of coefficients in the equation.

Call it by using Coefficients()

Referenced by Isis::BasisFunction::BasisFunction(), Isis::BasisFunction::Coefficients(), Isis::BasisFunction::Evaluate(), and Isis::BasisFunction::SetCoefficients().

int Isis::BasisFunction::p_numVars

protectedinherited

The number of variables in the equation. Call it by using Variables()

Referenced by Isis::BasisFunction::BasisFunction(), Isis::BasisFunction::Evaluate(), and Isis::BasisFunction::Variables().

std::vector<double> Isis::BasisFunction::p_terms

protectedinherited

A vector of the terms in the equation.

Call it by using Term()

Referenced by Isis::BasisFunction::Evaluate(), Isis::PolynomialUnivariate::Expand(), Isis::PolynomialBivariate::Expand(), Expand(), Isis::BasisFunction::Expand(), and Isis::BasisFunction::Term().

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

src/base/objs/Parabola/Parabola.h
src/base/objs/Parabola/Parabola.cpp