Easy tensorflow.js intro - basic operations

Tensorflow is the defacto standard for building advanced neural networks of any kind.
Natively tensorflow is a python library and gives to the user a framework that simplifies operation with tensors.

A tensor is a mathematical object analogous to but more general than a vector, represented by an array of components that are functions of the coordinates of a space.

if you are landing here you probably don't know what a neural network is or why you need a tensor or operations with tensor to build a neural network, but trust me you do.

In this small article will be presented how to fit a simple curve function.

f(x) = x^2 + x + c 

but first a bit of intro about some of the mathematical operations you can do with tensors

import * as tf from "@tensorflow/tfjs";

// declare two tensors
const a = tf.tensor([1, 2, 3]);
const b = tf.tensor([1, 2, 3]);

// sumElem is the sum of the element in tensor a
const sumElem = a.sum(); // 6

// prodElem is the product of the elements in tensor a
const prodElem = a.prod(); // 6

// dotProd is the dot product of the 2 tensors
const dotProd = a.dot(b) // {0: 14}

// subtTens is the result of Tensor a - Tensor b
const subtTens = a.sub(b) // {0: 0, 1: 0, 2: 0}

those are some of the basics operations you can do with tf ... of course to go deep into that please follow the API documentation https://js.tensorflow.org/api/latest/