Package org.hipparchus.analysis.function
Class Logistic
java.lang.Object
org.hipparchus.analysis.function.Logistic
- All Implemented Interfaces:
UnivariateDifferentiableFunction
,UnivariateFunction
Generalised logistic function.
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Nested Class Summary
Modifier and TypeClassDescriptionstatic class
Parametric function where the input array contains the parameters of thelogistic function
, ordered as follows: k m b q a n -
Constructor Summary
ConstructorDescriptionLogistic
(double k, double m, double b, double q, double a, double n) Simple constructor. -
Method Summary
Modifier and TypeMethodDescriptiondouble
value
(double x) Compute the value of the function.<T extends Derivative<T>>
Tvalue
(T t) Compute the value for the function.
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Constructor Details
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Logistic
public Logistic(double k, double m, double b, double q, double a, double n) throws MathIllegalArgumentException Simple constructor.- Parameters:
k
- Ifb > 0
, value of the function for x going towards +∞. Ifb < 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
- Ifb > 0
, value of the function for x going towards -∞. Ifb < 0
, value of the function for x going towards +∞.n
- Parameter that affects near which asymptote the maximum growth occurs.- Throws:
MathIllegalArgumentException
- ifn <= 0
.
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Method Details
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value
public double value(double x) Compute the value of the function.- Specified by:
value
in interfaceUnivariateFunction
- Parameters:
x
- Point at which the function value should be computed.- Returns:
- the value of the function.
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value
Compute the value for the function.- Specified by:
value
in interfaceUnivariateDifferentiableFunction
- Type Parameters:
T
- the type of the field elements- Parameters:
t
- the point for which the function value should be computed- Returns:
- the value
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