Logistic |
Fit fuction with one or more increasing steps (Logistic function), with a background polynomial
of variable order.
Inheritance HierarchyNamespace: Altaxo.Calc.FitFunctions.Transitions
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3179.0 (4.8.3179.0)
SyntaxC#
public class LogisticIncreasing : IFitFunctionWithDerivative, IFitFunction, IImmutable
The LogisticIncreasing type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | LogisticIncreasing | Initializes a new instance of the LogisticIncreasing class with NumberOfTerms=1, and OrderOfBackgroundPolynomial=0. |
| LogisticIncreasing(Int32, Int32) | Initializes a new instance of the LogisticIncreasing class. |
Properties| Name | Description | |
|---|---|---|
 | NumberOfDependentVariables | Number of dependent variables (i.e. y, in Altaxo this is commonly called v (like value)). |
| NumberOfIndependentVariables | Number of independent variables (i.e. x). |
| NumberOfParameters | Number of parameters of this fit function. |
| NumberOfTerms | Gets the number of logistic step terms. |
| OrderOfBackgroundPolynomial | Gets the order of the background polynomial. |
Methods| Name | Description | |
|---|---|---|
 | Create_1_0 | Creates a new instance of the LogisticIncreasing class, with NumberOfTerms=1 and OrderOfBackgroundPolynomial=0. |
| DefaultParameterValue | Returns a default parameter value. You must ensure that the fit function would generate values with those default parameters. |
| DefaultVarianceScaling | |
| DependentVariableName | Returns the ith dependent variable name. |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object) |
| Evaluate(Double, Double, Double) | This evaluates a function value. |
| Evaluate(IROMatrixDouble, IReadOnlyListDouble, IVectorDouble, IReadOnlyListBoolean) | |
| EvaluateDerivative | This evaluates the gradient of the function with respect to the parameters. |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object) |
| GetHashCode | Serves as the default hash function. (Inherited from Object) |
| GetParameterBoundariesHardLimit | Gets the parameter boundaries that are really a hard limit, i.e. outside those limits, the function would probably evaluate NaN values, or makes no sense. |
| GetParameterBoundariesSoftLimit | Gets the intended parameter boundaries. This are soft limits, boundaries so that the intended purpose of the fit function is fullfilled. Example: in the exponential decay Exp(-a*t) a is intended to be positive. This is a soft limit, and not a hard limit, because a could be also negative, and the fit nevertheless would succeed. |
| GetType | Gets the Type of the current instance. (Inherited from Object) |
| IndependentVariableName | Returns the ith independent variable name. |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object) |
| ParameterName | Returns the ith parameter name. |
| ToString | Returns a string that represents the current object. (Inherited from Object) |
| WithNumberOfTerms | Creates a new instance with the provided number of logistic step terms. |
| WithOrderOfBackgroundPolynomial | Creates a new instance with the provided order of the background polynomial. |
Events
RemarksSee Also