Isis Developer Reference
Isis::PolynomialUnivariate Class Reference

Nth degree Polynomial with one variable. More...

#include <PolynomialUnivariate.h>

Inheritance diagram for Isis::PolynomialUnivariate:
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Collaboration diagram for Isis::PolynomialUnivariate:
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Public Member Functions

 PolynomialUnivariate (int degree)
 Create a PolynomialUnivariate object.
 
 PolynomialUnivariate (int degree, std::vector< double > coeffs)
 Create a PolynomialUnivariate object.
 
 ~PolynomialUnivariate ()
 Destroys the PolynomialUnivariate object.
 
void Expand (const std::vector< double > &vars)
 This is the the overriding virtual function that provides the expansion of the two input variables into the polynomial equation.
 
double DerivativeVar (const double value)
 This will take the Derivative with respect to the variable and evaluate at given value.
 
double DerivativeCoef (const double value, const int coefIndex)
 Evaluate the derivative of the polynomial defined by the given coefficients with respect to the coefficient at the given index, at the current value.
 
void SetCoefficients (const std::vector< double > &coefs)
 Set the coefficients for the equation.
 
double Evaluate (const std::vector< double > &vars)
 Compute the equation using the input variables.
 
double Evaluate (const double &var)
 Compute the equation using the input variable.
 
int Coefficients () const
 Returns the number of coefficients for the equation.
 
int Variables () const
 Returns the number of variables in the equation.
 
QString Name () const
 Returns the name of the equation.
 
double Term (int c) const
 Returns the cth term.
 
double Coefficient (int i) const
 Returns the ith coefficient.
 

Protected Attributes

QString p_name
 The name of the equation. Call it by using Name()
 
int p_numVars
 The number of variables in the equation. Call it by using Variables()
 
int p_numCoefs
 The number of coefficients in the equation.
 
std::vector< double > p_coefs
 A vector of the coefficients in the equation.
 
std::vector< double > p_terms
 A vector of the terms in the equation.
 

Detailed Description

Nth degree Polynomial with one variable.

This is a derived class from Basis1VariableFunction which provides the capabilities of a polynomial equation in one variable with degree n, where n is specified during the object construction. For example, Degree = 1 z = a + b*x Degree = 2 z = a + b*x + c*x**2 Degree = 3 z = a + b*x + c*x**2 + d*x**3 In general the number of coefficients will be degree + 1.

Author
Debbie A. Cook 2007-11-19 (modified from Poly2D, now named PolynominalBivariate, 2004-06-24 Jeff Anderson)

Constructor & Destructor Documentation

◆ PolynomialUnivariate() [1/2]

Isis::PolynomialUnivariate::PolynomialUnivariate ( int degree)

Create a PolynomialUnivariate object.

Parameters
degreeThe order/degree of the polynomial

◆ PolynomialUnivariate() [2/2]

Isis::PolynomialUnivariate::PolynomialUnivariate ( int degree,
std::vector< double > coeffs )

Create a PolynomialUnivariate object.

Parameters
degreeThe order/degree of the polynomial
coeffsa list of the coefficients in increasing degree. So the first element is the constant coefficient.

References Isis::BasisFunction::SetCoefficients().

◆ ~PolynomialUnivariate()

Isis::PolynomialUnivariate::~PolynomialUnivariate ( )
inline

Destroys the PolynomialUnivariate object.

Member Function Documentation

◆ Coefficient()

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

Returns the ith coefficient.

Parameters
iThe index for the desired coefficient.
Returns
The ith coefficient

References Isis::BasisFunction::p_coefs.

Referenced by DerivativeVar(), Isis::SurfaceModel::MinMax(), and Isis::OverlapNormalization::Solve().

◆ Coefficients()

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 DerivativeCoef(), DerivativeVar(), and Isis::OverlapNormalization::Solve().

◆ DerivativeCoef()

double Isis::PolynomialUnivariate::DerivativeCoef ( const double value,
const int coefIndex )
virtual

Evaluate the derivative of the polynomial defined by the given coefficients with respect to the coefficient at the given index, at the current value.

Parameters
[in]value(const double) value at which to evaluate derivative
[in]coefIndex(const int) The index of the coefficient to differentiate with respect to
Returns
(double) The derivative evaluated at given value

Implements Isis::Basis1VariableFunction.

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

◆ DerivativeVar()

double Isis::PolynomialUnivariate::DerivativeVar ( const double value)
virtual

This will take the Derivative with respect to the variable and evaluate at given value.

Parameters
[in]value(const double) value at which to evaluate derivative
History
2008-01-09 Tracie Sucharski, Original Version

Implements Isis::Basis1VariableFunction.

References Isis::BasisFunction::Coefficient(), and Isis::BasisFunction::Coefficients().

Referenced by Isis::SpiceRotation::DCJdt().

◆ Evaluate() [1/2]

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

Compute the equation using the input variable.

Parameters
varA single double value to use for the equation.
Returns
The output double value resulting from the equation.

References Isis::BasisFunction::Evaluate().

◆ Evaluate() [2/2]

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

Compute the equation using the input variables.

Parameters
varsA 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(), and Isis::LeastSquares::Evaluate().

◆ Expand()

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

This is the the overriding virtual function that provides the expansion of the two input variables into the polynomial equation.

See BasisFunction for more information.

Parameters
varsA vector of double values to use for the expansion.

Reimplemented from Isis::BasisFunction.

References Isis::BasisFunction::p_terms.

◆ Name()

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().

◆ SetCoefficients()

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

Set the coefficients for the equation.

Parameters
coefsA 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(), and PolynomialUnivariate().

◆ Term()

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
cThe index for the desired coefficient.
Returns
The cth term.

References Isis::BasisFunction::p_terms.

◆ Variables()

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 Isis::NthOrderPolynomial::Expand().

Member Data Documentation

◆ p_coefs

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().

◆ p_name

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().

◆ p_numCoefs

int Isis::BasisFunction::p_numCoefs
protectedinherited

◆ p_numVars

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().

◆ p_terms

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

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