# Class Logit

java.lang.Object
org.hipparchus.analysis.function.Logit
All Implemented Interfaces:
UnivariateDifferentiableFunction, UnivariateFunction

public class Logit extends Object implements UnivariateDifferentiableFunction
Logit function. It is the inverse of the sigmoid function.
• ## Nested Class Summary

Nested Classes
Modifier and Type
Class
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
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

Modifier and Type
Method
Description
double
value(double x)
Compute the value of the function.
<T extends Derivative<T>>T
value(T t)
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 Details

• ### 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 Details

• ### value

public double value(double x) throws MathIllegalArgumentException
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:
MathIllegalArgumentException
• ### value

public <T extends Derivative<T>> T value(T t) throws MathIllegalArgumentException
Compute the value for the function.
Specified by:
value in interface UnivariateDifferentiableFunction
Type Parameters:
T - the type of the field elements
Parameters:
t - the point for which the function value should be computed
Returns:
the value
Throws:
MathIllegalArgumentException - if parameter is outside of function domain