@thi.ng/distance/squared.js

N-dimensional distance metrics & K-nearest neighborhoods for point queries

import { distSq, distSq2, distSq3 } from "@thi.ng/vectors/distsq";
class Squared {
  constructor(metric) {
    this.metric = metric;
  }
  to(x) {
    return x * x;
  }
  from(x) {
    return Math.sqrt(x);
  }
}
const DIST_SQ = new Squared(distSq);
const DIST_SQ1 = new Squared((a, b) => (a - b) ** 2);
const DIST_SQ2 = new Squared(distSq2);
const DIST_SQ3 = new Squared(distSq3);
export {
  DIST_SQ,
  DIST_SQ1,
  DIST_SQ2,
  DIST_SQ3,
  Squared
};