Class Sigmoid

Class representing a Sigmoid.

Example

// long slope
const sigmoid = new Sigmoid(0, 100000);
sigmoid.fuzzify(10); // ~0.500025

Implements

Fuzzifier

Index

Constructors

Methods

Constructors

constructor

new Sigmoid(center?: number, slope?: number): Sigmoid
Create a Sigmoid Function.
Parameters
- center: number = 0
  The center point of the sigmoid curve (where it outputs 0.5). Must be finite.
- slope: number = 1
  Width of the transition: it appears in the denominator as 1 / (1 + exp(-(x - center) / slope)), so a smaller magnitude means a steeper transition and a larger magnitude a gentler one. A negative slope inverts the curve into a decreasing S (high membership below the center, low above). A slope of 0 degenerates to an increasing step at the center (0.5 exactly at the center). Must be finite; non-finite center/slope throw.
Returns Sigmoid
- Defined in curve/sigmoid.ts:25

Methods

fuzzify

fuzzify(x: number): number
Fuzzify
Parameters
- x: number
  Point on X axis
Returns number
fuzzy output 0..1
Implementation of Fuzzifier.fuzzify
- Defined in curve/sigmoid.ts:43