Expm1

java.lang.Object
- org.apache.commons.math3.analysis.function.Expm1

All Implemented Interfaces:

DifferentiableUnivariateFunction, UnivariateDifferentiableFunction, UnivariateFunction
```
public class Expm1
extends java.lang.Object
implements UnivariateDifferentiableFunction, DifferentiableUnivariateFunction
```
e^x-1 function.

Since:

3.0

Constructor Summary

Constructors
Constructor Description

Expm1()

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`UnivariateFunction`	`derivative()`	Deprecated. as of 3.1, replaced by `value(DerivativeStructure)`
`double`	`value(double x)`	Compute the value of the function.
`DerivativeStructure`	`value(DerivativeStructure t)`	Simple mathematical function.

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

- Constructor Detail
  - Expm1
```
public Expm1()
```
- Method Detail
  - value
```
public double value(double x)
```
    Compute the value of the function.
    
    Specified by:
    
    value in interface UnivariateFunction
    
    Parameters:
    
    x - Point at which the function value should be computed.
    
    Returns:
    
    the value of the function.
  - derivative
```
@Deprecated
public UnivariateFunction derivative()
```
    Deprecated.
    as of 3.1, replaced by value(DerivativeStructure)
    
    Returns the derivative of the function
    
    Specified by:
    
    derivative in interface DifferentiableUnivariateFunction
    
    Returns:
    
    the derivative function
  - value
```
public DerivativeStructure value(DerivativeStructure t)
```
    Simple mathematical function.
    UnivariateDifferentiableFunction classes compute both the value and the first derivative of the function.
    
    Specified by:
    
    value in interface UnivariateDifferentiableFunction
    
    Parameters:
    
    t - function input value
    
    Returns:
    
    function result
    
    Since:
    
    3.1