GaussianDerivativeFunction (Commons Math 2.2 API)

java.lang.Object
- org.apache.commons.math.optimization.fitting.GaussianDerivativeFunction

All Implemented Interfaces:

java.io.Serializable, UnivariateRealFunction
```
public class GaussianDerivativeFunction
extends java.lang.Object
implements UnivariateRealFunction, java.io.Serializable
```
The derivative of GaussianFunction. Specifically:
f'(x) = (-b / (d^2)) * (x - c) * exp(-((x - c)^2) / (2*(d^2)))
Notation key:
- x^n: x raised to the power of n
- exp(x): e^x
Since:

2.2

Version:

$Revision: 1037327 $ $Date: 2010-11-20 21:57:37 +0100 (sam. 20 nov. 2010) $

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`GaussianDerivativeFunction(double[] parameters)`	Constructs an instance with the specified parameters.
`GaussianDerivativeFunction(double b, double c, double d)`	Constructs an instance with the specified parameters.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

double value(double x)
Compute the value for the function.
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - GaussianDerivativeFunction
```
public GaussianDerivativeFunction(double b,
                                  double c,
                                  double d)
```
    Constructs an instance with the specified parameters.
    
    Parameters:
    
    b - b parameter value
    
    c - c parameter value
    
    d - d parameter value
    
    Throws:
    
    java.lang.IllegalArgumentException - if d is 0
  - GaussianDerivativeFunction
```
public GaussianDerivativeFunction(double[] parameters)
```
    Constructs an instance with the specified parameters.
    
    Parameters:
    
    parameters - b, c, and d parameter values
    
    Throws:
    
    java.lang.IllegalArgumentException - if parameters is null, parameters length is not 3, or if parameters[2] is 0
- Method Detail
  - value
```
public double value(double x)
```
    Compute the value for the function.
    
    Specified by:
    
    value in interface UnivariateRealFunction
    
    Parameters:
    
    x - the point for which the function value should be computed
    
    Returns:
    
    the value