neural-network-node/utils/global/npm/Sigmoid.js

A simple neural network coded from scratch with no external modules. Lets you train your own neural network in a simple and easy to learn way.

function sigmoid(x) {
  return 1 / (1 + Math.exp(-x));
}

function dsigmoid(y) {
  return y * (1 - y);
}

exports.sigmoid = sigmoid;
exports.dsigmoid = dsigmoid;