lib.easyjava.math.function

Class UnivariatePolynomialFunction

java.lang.Object

lib.easyjava.math.function.UnivariatePolynomialFunction

All Implemented Interfaces:

java.io.Serializable, java.util.function.DoubleUnaryOperator, DifferentiableFunction, IntegrableFunction, MathematicalFunction

public class UnivariatePolynomialFunction
extends java.lang.Object
implements DifferentiableFunction, IntegrableFunction, java.util.function.DoubleUnaryOperator

A univariate polynomial function

Author:

Rob Rua (robrua@alumni.cmu.edu)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
UnivariatePolynomialFunction(double[] coefficients)

Method Summary

Modifier and Type	Method and Description
double	applyAsDouble(double arg0)
UnivariatePolynomialFunction	derivative() Takes the derivative of this function
boolean	equals(java.lang.Object obj)
double	evaluate(double x) Evaluates the function at the given x.
int	hashCode()
UnivariatePolynomialFunction	integral() Takes the indefinite integral of this function, letting the constant value c be 0
UnivariatePolynomialFunction	minus(UnivariatePolynomialFunction f) Subtracts the provided function from this one
UnivariatePolynomialFunction	opposite() Reverses the sign of this function
UnivariatePolynomialFunction	plus(UnivariatePolynomialFunction f) Adds the provided function to this one
UnivariatePolynomialFunction	times(UnivariatePolynomialFunction f) Multiplies the given function with this one
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.function.DoubleUnaryOperator

andThen, compose, identity

Constructor Detail

UnivariatePolynomialFunction

public UnivariatePolynomialFunction(double[] coefficients)

Parameters:

coefficients - the coefficients of the polynomial, from the highest order term to the lowest

Method Detail

applyAsDouble

public double applyAsDouble(double arg0)

Specified by:

applyAsDouble in interface java.util.function.DoubleUnaryOperator

derivative

public UnivariatePolynomialFunction derivative()

Description copied from interface: DifferentiableFunction

Takes the derivative of this function

Specified by:

derivative in interface DifferentiableFunction

Returns:

the derivative

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

evaluate

public double evaluate(double x)

Evaluates the function at the given x. This is equivalent to a call to applyAsDouble(x).

Parameters:

x - the x to evaluate at

Returns:

the value at that x

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

integral

public UnivariatePolynomialFunction integral()

Description copied from interface: IntegrableFunction

Takes the indefinite integral of this function, letting the constant value c be 0

Specified by:

integral in interface IntegrableFunction

Returns:

the integral

minus

public UnivariatePolynomialFunction minus(UnivariatePolynomialFunction f)

Subtracts the provided function from this one

Parameters:

f - the function to subtract from this

Returns:

the difference of the functions

opposite

public UnivariatePolynomialFunction opposite()

Reverses the sign of this function

Returns:

the function with reversed sign

plus

public UnivariatePolynomialFunction plus(UnivariatePolynomialFunction f)

Adds the provided function to this one

Parameters:

f - the function to add to this

Returns:

the sum of the two functions

times

public UnivariatePolynomialFunction times(UnivariatePolynomialFunction f)

Multiplies the given function with this one

Parameters:

f - the function to multiply this by

Returns:

the product of the functions

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object