preprocessing.normalize

import { normalize } from 'machinelearn/preprocessing';

const result = normalize([
  [1, -1, 2],
  [2, 0, 0],
  [0, 1, -1],
], { norm: 'l2' });
console.log(result);
// [ [ 0.4082482904638631, -0.4082482904638631, 0.8164965809277261 ],
// [ 1, 0, 0 ],
// [ 0, 0.7071067811865475, -0.7071067811865475 ] ]