Package org.apache.commons.math4.analysis.function

Class Logistic

java.lang.Object
org.apache.commons.math4.analysis.function.Logistic
All Implemented Interfaces:
UnivariateDifferentiableFunction, UnivariateFunction
public class Logistic
extends java.lang.Object
implements UnivariateDifferentiableFunction
Generalised logistic function.
Since:
3.0

  • 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)  

  • Method Summary

    Modifier and Type Method Description
    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 Details

    • Logistic

      public Logistic​(double k, double m, double b, double q, double a, double n) throws NotStrictlyPositiveException
      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:
      NotStrictlyPositiveException - if n <= 0.

  • Method Details