# Class Logistic

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

public class Logistic extends Object implements UnivariateDifferentiableFunction
• ## Nested Class Summary

Nested Classes
Modifier and Type
Class
Description
static class
Logistic.Parametric
Parametric function where the input array contains the parameters of the logistic function, ordered as follows: k m b q a n
• ## Constructor Summary

Constructors
Constructor
Description
Logistic(double k, double m, double b, double q, double a, double n)
Simple constructor.
• ## 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

• ### Logistic

public Logistic(double k, double m, double b, double q, double a, double n) throws MathIllegalArgumentException
Simple constructor.
Parameters:
k - If b > 0, value of the function for x going towards +∞. If b < 0, value of the function for x going towards -∞.
m - Abscissa of maximum growth.
b - Growth rate.
q - Parameter that affects the position of the curve along the ordinate axis.
a - If b > 0, value of the function for x going towards -∞. If b < 0, value of the function for x going towards +∞.
n - Parameter that affects near which asymptote the maximum growth occurs.
Throws:
MathIllegalArgumentException - if n <= 0.
• ## Method Details

• ### 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.
• ### value

public <T extends Derivative<T>> T value(T t)
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