AForge.Neuro.BipolarSigmoidFunction.Derivative2 C# (CSharp) Method

BipolarSigmoidFunction Class Documentation Show file Open project: holisticware-admin/MonoVersal.AForgeNET

Derivative2() public method

Calculates function derivative.

The method calculates the same derivative value as the Derivative method, but it takes not the input x value itself, but the function value, which was calculated previously with the help of Function method.

Some applications require as function value, as derivative value, so they can save the amount of calculations using this method to calculate derivative.

public Derivative2 ( double y ) : double
y	double	Function output value - the value, which was obtained /// with the help of method.
return	double

        public double Derivative2( double y )
        {
            return ( alpha * ( 1 - y * y ) / 2 );
        }

BipolarSigmoidFunction

Clone

Derivative

Derivative2

Function