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java.lang.Objectorg.apache.commons.math3.analysis.function.Logistic
public class Logistic
Generalised logistic function.
| Nested Class Summary | |
|---|---|
static class |
Logistic.Parametric
Parametric function where the input array contains the parameters of the logit function, ordered as follows: Lower asymptote Higher asymptote |
| Constructor Summary | |
|---|---|
Logistic(double k,
double m,
double b,
double q,
double a,
double n)
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| Method Summary | |
|---|---|
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 |
|---|
public Logistic(double k,
double m,
double b,
double q,
double a,
double n)
throws NotStrictlyPositiveException
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.
NotStrictlyPositiveException - if n <= 0.| Method Detail |
|---|
public double value(double x)
value in interface UnivariateFunctionx - Point at which the function value should be computed.
@Deprecated public UnivariateFunction derivative()
value(DerivativeStructure)
derivative in interface DifferentiableUnivariateFunctionpublic DerivativeStructure value(DerivativeStructure t)
UnivariateDifferentiableFunction classes compute both the
value and the first derivative of the function.
value in interface UnivariateDifferentiableFunctiont - function input value
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