IActivation.Derivative Method

IActivationDerivative Method

Returns the value of the derivative of the activation function.

Namespace: Imsl.DataMining.Neural
Assembly: ImslCS (in ImslCS.dll) Version: 6.5.2.0

Syntax

double Derivative(
	double x,
	double y
)

Function Derivative ( 
	x As Double,
	y As Double
) As Double

double Derivative(
	double x, 
	double y
)

abstract Derivative : 
        x : float * 
        y : float -> float

x: Type: SystemDouble
A double which specifies the point at which the activation function is to be evaluated.
y: Type: SystemDouble
A double which specifies y = g(x), the value of the activation function at x.

Type: Double
A double containing the value of the derivative of the activation function at x.

Remarks

y is not mathematically required, but can sometimes be used to more quickly compute the derivative.