fr.cnes.sirius.patrius.propagation.analytical.twod

Class DatePolynomialChebyshevFunction

java.lang.Object

fr.cnes.sirius.patrius.propagation.analytical.twod.DatePolynomialChebyshevFunction

All Implemented Interfaces:

DatePolynomialFunctionInterface, UnivariateDateFunction, Serializable

public class DatePolynomialChebyshevFunction
extends Object
implements DatePolynomialFunctionInterface

This class represents a Chebyshev polynomial function of date.

The real time (unreduced time) is used.

Since:

4.10

Author:

Alice Latourte

See Also:

Serialized Form

Concurrency :

thread-safe

Constructor Summary

Constructors

Constructor and Description
DatePolynomialChebyshevFunction(AbsoluteDate originDate, AbsoluteDate tStart, AbsoluteDate tEnd, double[] polynomialCoefs) Constructor.
DatePolynomialChebyshevFunction(AbsoluteDate originDate, PolynomialChebyshevFunction polyFunction) Constructor.

Method Summary

Modifier and Type	Method and Description
DatePolynomialChebyshevFunction	copy() Copies this function and returns a new one identical to this.
AbsoluteDate[]	getChebyshevAbscissas(int n) Compute the N Chebyshev abscissas on the range [start ; end] in a chronological (increasing) order.
double[]	getCoefficients() Get the polynomial coefficients.
int	getDegree() Return the polynomial degree.
AbsoluteDate	getEnd() Returns the Chebyshev polynomial range end date
int	getOrder() Returns polynomial order.
AbsoluteDateInterval	getRange() Returns the Chebyshev polynomial range
AbsoluteDate	getStart() Returns the Chebyshev polynomial range start date
AbsoluteDate	getT0() Returns the Chebyshev polynomial origin date
DatePolynomialChebyshevFunction	polynomialDerivative() Return the derivative date polynomial function.
DatePolynomialChebyshevFunction	primitive(AbsoluteDate date0, double value0) Return the primitive date polynomial function at the given date and for the given function value at abscissa0.
double	value(AbsoluteDate date) Returns value of function at provided date.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface fr.cnes.sirius.patrius.math.analysis.polynomials.DatePolynomialFunctionInterface

dateToDouble, doubleToDate, getAbsoluteDateFromDoubleDate, getDoubleDateFromAbsoluteDate

Constructor Detail

DatePolynomialChebyshevFunction

public DatePolynomialChebyshevFunction(AbsoluteDate originDate,
                                       AbsoluteDate tStart,
                                       AbsoluteDate tEnd,
                                       double[] polynomialCoefs)

Constructor.

Parameters:

originDate - the polynomial origin date

tStart - the Chebyshev polynomial range start date

tEnd - the Chebyshev polynomial range end date

polynomialCoefs - the polynomial development coefficients

DatePolynomialChebyshevFunction

public DatePolynomialChebyshevFunction(AbsoluteDate originDate,
                                       PolynomialChebyshevFunction polyFunction)

Constructor.

Parameters:

originDate - the polynomial origin date

polyFunction - the polynomial function

Method Detail

copy

public DatePolynomialChebyshevFunction copy()

Copies this function and returns a new one identical to this.

Returns:

new DatePolynomialChebyshevFunction identical to this

getT0

public AbsoluteDate getT0()

Returns the Chebyshev polynomial origin date

Specified by:

getT0 in interface DatePolynomialFunctionInterface

Returns:

the Chebyshev polynomial origin date

getStart

public AbsoluteDate getStart()

Returns the Chebyshev polynomial range start date

Returns:

the Chebyshev polynomial range start date

getEnd

public AbsoluteDate getEnd()

Returns the Chebyshev polynomial range end date

Returns:

the Chebyshev polynomial range end date

getRange

public AbsoluteDateInterval getRange()

Returns the Chebyshev polynomial range

Returns:

the Chebyshev polynomial range

getOrder

public int getOrder()

Returns polynomial order.

Returns:

the polynomial order

getChebyshevAbscissas

public AbsoluteDate[] getChebyshevAbscissas(int n)

Compute the N Chebyshev abscissas on the range [start ; end] in a chronological (increasing) order.

Parameters:

n - Number of points to evaluate

Returns:

the N Chebyshev abscissas

Throws:

NotStrictlyPositiveException - if n <= 0

value

public double value(AbsoluteDate date)

Returns value of function at provided date.

Specified by:

value in interface UnivariateDateFunction

Parameters:

date - a date

Returns:

value of function at provided date

getDegree

public int getDegree()

Return the polynomial degree.

Specified by:

getDegree in interface DatePolynomialFunctionInterface

Returns:

the polynomial degree

getCoefficients

public double[] getCoefficients()

Get the polynomial coefficients.

Specified by:

getCoefficients in interface DatePolynomialFunctionInterface

Returns:

the polynomial coefficients

polynomialDerivative

public DatePolynomialChebyshevFunction polynomialDerivative()

Return the derivative date polynomial function.

Specified by:

polynomialDerivative in interface DatePolynomialFunctionInterface

Returns:

the derivative date polynomial function

primitive

public DatePolynomialChebyshevFunction primitive(AbsoluteDate date0,
                                                 double value0)

Return the primitive date polynomial function at the given date and for the given function value at abscissa0.

Specified by:

primitive in interface DatePolynomialFunctionInterface

Parameters:

date0 - the date of interest

value0 - the function value at abscissa0

Returns:

the primitive date polynomial function at the given date and for the given function value at abscissa0