A example neural network
npm install vt-neural-network-tsImplementantion of a Perceptron neural network in JavaScript. It is a simple implementation that can serve as an example for learning, not for production use. It does not use GPU and the only activation function implemented is a sigmoid function.
For a ready to use implementation please refer to BrainJS
npm i vt-neural-network-ts
Usage
js
import { Network } from 'vt-neural-network-ts'// Define the layer structure
const layers = [
2, // This is the input layer
10, // Hidden layer 1
10, // Hidden layer 2
1 // Output
]
const network = new Network(layers)
// Start training
const numberOfIterations = 20000
// Training data for a "XOR" logic gate
const trainingData = [{
input : [0,0],
output: [0]
}, {
input : [0,1],
output: [1]
}, {
input : [1,0],
output: [1]
}, {
input : [1,1],
output: [0]
}]
for(var i = 0; i < numberOfIterations; i ++) {
// Get a random training sample
const trainingItem = trainingData[Math.floor((Math.random()*trainingData.length))]
network.train(trainingItem.input, trainingItem.output);
}
// After training we can see if it works
// we call activate to set a input in the first layer
network.activate(trainingData[0].input)
const resultA = network.run()
network.activate(trainingData[1].input)
const resultB = network.run()
network.activate(trainingData[2].input)
const resultC = network.run()
network.activate(trainingData[3].input)
const resultD = network.run()
console.log('Expected 0 got', resultA[0])
console.log('Expected 1 got', resultB[0])
console.log('Expected 1 got', resultC[0])
console.log('Expected 0 got', resultD[0])
`If you want to see other logic gates implementations, check the test folder.
API
-
: Adjust the learning rate of the network,
- network.toJSON(): returns the structure of the network
- network.layers: contains the different layers of the network
- layer.neurons: contains the different neurons on each layer
How to develop the application?
`bash
npm install
npm run watch
Open public/ directory in browser
`Remove generated directory
If you would like to remove
directory (created by Webpack):`bash
npm run clear
`If you would like to remove
and remove public/dist/bash
npm run clear:all
`Count LOC (Lines of Code)
If you would like to know how many lines of code you write:
bash
npm run count
`Analysis of bundle file weight
If you would like to check how much a bundle file weight:
bash
npm run audit
``