Represents a 5 parameter logistic curve that includes an asymmetry parameter..

Namespace: Extreme.Mathematics.Curves.Nonlinear
Assembly: Extreme.Numerics (Extreme.Numerics)

Syntax

Visual Basic (Declaration)
Public Class FiveParameterLogisticCurve _ Inherits NonlinearCurve

C#
public class FiveParameterLogisticCurve : NonlinearCurve

C++
public ref class FiveParameterLogisticCurve : public NonlinearCurve

Methods

Icon	Type	Description
	Clone()	Constructs an exact copy of this instance.
	Equals(Object)	Determines whether the specified Object is equal to the current Object.
	FillPartialDerivatives(Double, GeneralVector)	Fills a GeneralVector with the partial derivatives of the curve with respect to each of the curve parameters.
	Finalize()	Allows an Object to attempt to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection.
	FindRoots()	Gets the set of X-coordinates where the curve crosses the X-axis.
	GetCurveFitter()	Returns a CurveFitter object that can be used to fit the curve to data.
	GetDerivative()	Returns a Curve that represents the derivative of this Curve.
	GetHashCode()	Serves as a hash function for a particular type.
	GetType()	Gets the Type of the current instance.
	Integral(Double, Double)	Gets the definite integral of the curve between the specified X-coordinates.
	MemberwiseClone()	Creates a shallow copy of the current Object.
	OnParameterChanged(Int32, Double)	Called after a Curve parameter has been changed.
	OnParameterChanging(Int32, Double)	Called before the value of a curve parameter is changed.
	SetInitialValues(Vector, Vector)	Sets the curve parameters to initial values based on the specified data.
	SlopeAt(Double)	Gets the slope of the curve at the specified X-coordinate.
	TangentAt(Double)	Gets the tangent Line to the curve at the specified X-coordinate.
	ToString()	Returns a String that represents the current Object.
	ValueAt(Double)	Gets the Y-value of the curve at the specified X-coordinate.

Constructors

Icon	Type	Description
	FiveParameterLogisticCurveNew()	Constructs a new logistic curve.

Properties

Icon	Type	Description
	AsymmetryFactor	Gets or sets the asymmetry
	Center	Gets or sets the center of the logistic curve.
	FinalValue	Gets or sets the initial value of the logistic curve.
	HillSlope	Gets or sets the Hill slope of the logistic curve.
	InitialValue	Gets or sets the initial value of the logistical curve.
	Parameters	Gets the collection of parameters that determine the shape of this Curve.

Remarks

Use the FiveParameterLogisticCurve class to fit a five parameter logistic curve to data. This type of curve is often used to represent growth processes, or a transition of a quantity from one level to another level.

With the FourParameterLogisticCurve curve, the change from the initial value and towards the final value are fairly symmetrical. When the data does not show this behavior, the resulting fit may not be adequate. The FiveParameterLogisticCurve curve remedies this situation by adding an asymmetry factor:

For details on how to fit a curve of this type, see the NonlinearCurveFitter class.

Inheritance Hierarchy

System.Object
  Extreme.Mathematics.Curves.Curve
    Extreme.Mathematics.Curves.NonlinearCurve
      Extreme.Mathematics.Curves.Nonlinear.FiveParameterLogisticCurve