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BipolarSigmoidFunction Class |
Bipolar sigmoid activation function.
Inheritance HierarchySystemObject
Accord.NeuroBipolarSigmoidFunction
Accord.NeuroBipolarSigmoidFunction
Namespace: Accord.Neuro
Assembly: Accord.Neuro (in Accord.Neuro.dll) Version: 3.8.0
Syntax[SerializableAttribute] public class BipolarSigmoidFunction : IActivationFunction, ICloneable
The BipolarSigmoidFunction type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | BipolarSigmoidFunction |
Initializes a new instance of the SigmoidFunction class.
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| BipolarSigmoidFunction(Double) |
Initializes a new instance of the BipolarSigmoidFunction class.
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Properties
Methods| Name | Description | |
|---|---|---|
| Clone |
Creates a new object that is a copy of the current instance.
|
| Derivative |
Calculates function derivative.
|
| Derivative2 |
Calculates function derivative.
|
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| Function |
Calculates function value.
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| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Extension Methods| Name | Description | |
|---|---|---|
 | HasMethod |
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.) |
| IsEqual |
Compares two objects for equality, performing an elementwise
comparison if the elements are vectors or matrices.
(Defined by Matrix.) |
| To(Type) | Overloaded.
Converts an object into another type, irrespective of whether
the conversion can be done at compile time or not. This can be
used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.) |
| ToT | Overloaded.
Converts an object into another type, irrespective of whether
the conversion can be done at compile time or not. This can be
used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.) |
RemarksThe class represents bipolar sigmoid activation function with the next expression:
2
f(x) = ------------------ - 1
1 + exp(-alpha * x)
2 * alpha * exp(-alpha * x )
f'(x) = -------------------------------- = alpha * (1 - f(x)^2) / 2
(1 + exp(-alpha * x))^2Output range of the function: [-1, 1].
Functions graph:
See Also