PolynomialFunction2D

java.lang.Object
- org.jfree.data.function.PolynomialFunction2D

All Implemented Interfaces:

java.io.Serializable, Function2D
```
public class PolynomialFunction2D
extends java.lang.Object
implements Function2D, java.io.Serializable
```
A function in the form y = a0 + a1 * x + a2 * x^2 + ... + an * x^n. Instances of this class are immutable.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

private double[] coefficients
The coefficients.

Constructor Summary

Constructors
Constructor Description

PolynomialFunction2D(double[] coefficients)
Constructs a new polynomial function y = a0 + a1 * x + a2 * x^2 + ... + an * x^n

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.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - coefficients
```
private double[] coefficients
```
    The coefficients.
- Constructor Detail
  - PolynomialFunction2D
```
public PolynomialFunction2D(double[] coefficients)
```
    Constructs a new polynomial function y = a0 + a1 * x + a2 * x^2 + ... + an * x^n
    
    Parameters:
    
    coefficients - an array with the coefficients [a0, a1, ..., an] (null not permitted).
- Method Detail
  - getCoefficients
```
public double[] getCoefficients()
```
    Returns a copy of the coefficients array that was specified in the constructor.
    
    Returns:
    
    The coefficients array.
  - getOrder
```
public int getOrder()
```
    Returns the order of the polynomial.
    
    Returns:
    
    The order.
  - getValue
```
public double getValue(double x)
```
    Returns the function value.
    
    Specified by:
    
    getValue in interface Function2D
    
    Parameters:
    
    x - the x-value.
    
    Returns:
    
    The value.
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Tests this function for equality with an arbitrary object.
    
    Overrides:
    
    equals in class java.lang.Object
    
    Parameters:
    
    obj - the object (null permitted).
    
    Returns:
    
    A boolean.
  - hashCode
```
public int hashCode()
```
    Returns a hash code for this instance.
    
    Overrides:
    
    hashCode in class java.lang.Object
    
    Returns:
    
    A hash code.