Logit (Apache Commons Math 3.6.1 API)

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

All Implemented Interfaces:

DifferentiableUnivariateFunction, UnivariateDifferentiableFunction, UnivariateFunction
```
public class Logit
extends Object
implements UnivariateDifferentiableFunction, DifferentiableUnivariateFunction
```
Logit function. It is the inverse of the sigmoid function.

Since:

3.0

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`Logit.Parametric` Parametric function where the input array contains the parameters of the logit function, ordered as follows: Lower bound Higher bound

Constructor Summary

Constructors
Constructor and Description

Logit()
Usual logit function, where the lower bound is 0 and the higher bound is 1.

Logit(double lo, double hi)
Logit function.

Constructors
Constructor and Description
`Logit()` Usual logit function, where the lower bound is 0 and the higher bound is 1.
`Logit(double lo, double hi)` Logit function.

Method Summary

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

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

- Constructor Detail
  - Logit
```
public Logit()
```
    Usual logit function, where the lower bound is 0 and the higher bound is 1.
  - Logit
```
public Logit(double lo,
     double hi)
```
    Logit function.
    
    Parameters:
    lo - Lower bound of the function domain.
    hi - Higher bound of the function domain.
- Method Detail
  - value
```
public double value(double x)
             throws OutOfRangeException
```
    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.
    
    Throws:
    
    OutOfRangeException
  - 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)
                          throws OutOfRangeException
```
    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
    
    Throws:
    
    OutOfRangeException - if parameter is outside of function domain
    Since:
    
    3.1

Class Logit

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Logit

Logit

Method Detail

value

derivative

value