Package org.jfree.data.function
Class PolynomialFunction2D
- java.lang.Object
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- org.jfree.data.function.PolynomialFunction2D
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- All Implemented Interfaces:
java.io.Serializable
,Function2D
public class PolynomialFunction2D extends java.lang.Object implements Function2D, java.io.Serializable
A function in the formy = a0 + a1 * x + a2 * x^2 + ... + an * x^n
. Instances of this class are immutable.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description private double[]
coefficients
The coefficients.
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Constructor Summary
Constructors Constructor Description PolynomialFunction2D(double[] coefficients)
Constructs a new polynomial functiony = a0 + a1 * x + a2 * x^2 + ... + an * x^n
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(java.lang.Object obj)
Tests this function for equality with an arbitrary object.double[]
getCoefficients()
Returns a copy of the coefficients array that was specified in the constructor.int
getOrder()
Returns the order of the polynomial.double
getValue(double x)
Returns the function value.int
hashCode()
Returns a hash code for this instance.
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Method Detail
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getCoefficients
public double[] getCoefficients()
Returns a copy of the coefficients array that was specified in the constructor.- Returns:
- The coefficients array.
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getOrder
public int getOrder()
Returns the order of the polynomial.- Returns:
- The order.
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getValue
public double getValue(double x)
Returns the function value.- Specified by:
getValue
in interfaceFunction2D
- Parameters:
x
- the x-value.- Returns:
- The value.
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equals
public boolean equals(java.lang.Object obj)
Tests this function for equality with an arbitrary object.- Overrides:
equals
in classjava.lang.Object
- Parameters:
obj
- the object (null
permitted).- Returns:
- A boolean.
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hashCode
public int hashCode()
Returns a hash code for this instance.- Overrides:
hashCode
in classjava.lang.Object
- Returns:
- A hash code.
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