@thi.ng/vectors/randoms.js

Optimized 2d/3d/4d and arbitrary length vector operations, support for memory mapping/layouts

import { normal } from "@thi.ng/random/distributions/normal";
import { SYSTEM } from "@thi.ng/random/system";
import { defHofOpS } from "./compile/emit.js";
import { NEW_OUT_A, SARGS_VV } from "./compile/templates.js";
import {
  normalizeS,
  normalizeS2,
  normalizeS3,
  normalizeS4
} from "./normalizes.js";
const [randomS, randomS2, randomS3, randomS4] = defHofOpS(
  SYSTEM,
  ([a]) => `${a}=rnd.minmax(n,m);`,
  "a",
  "n=-1,m=1,rnd=op,ia=0,sa=1",
  "a",
  "a",
  NEW_OUT_A
);
const [
  randomDistribS,
  randomDistribS2,
  randomDistribS3,
  randomDistribS4
] = defHofOpS(
  normal,
  ([a]) => `${a}=rnd()*n;`,
  "a",
  "rnd=op(),n=1,ia=0,sa=1",
  "a",
  "a",
  NEW_OUT_A
);
const $norm = (normalize, random) => (a, n = 1, rnd, ia = 0, sa = 1) => normalize(null, random(a, -1, 1, rnd, ia, sa), n, ia, ia, sa, sa);
const $normDist = (normalize, random) => (a, rnd, n = 1, ia = 0, sa = 1) => normalize(null, random(a, rnd, 1, ia, sa), n, ia, ia, sa, sa);
const randNormS = (a, num, n = 1, rnd, ia = 0, sa = 1) => normalizeS(
  a = randomS(a, num, -1, 1, rnd, ia, sa),
  a,
  num,
  n,
  ia,
  ia,
  sa,
  sa
);
const randNormS2 = $norm(normalizeS2, randomS2);
const randNormS3 = $norm(normalizeS3, randomS3);
const randNormS4 = $norm(normalizeS4, randomS4);
const randNormDistribS = (a, num, rnd, n = 1, ia = 0, sa = 1) => normalizeS(
  null,
  randomDistribS(a, num, rnd, 1, ia, sa),
  num,
  n,
  ia,
  ia,
  sa,
  sa
);
const randNormDistribS2 = $normDist(normalizeS2, randomDistribS2);
const randNormDistribS3 = $normDist(normalizeS3, randomDistribS3);
const randNormDistribS4 = $normDist(normalizeS4, randomDistribS4);
const [randMinMaxS, randMinMaxS2, randMinMaxS3, randMinMaxS4] = defHofOpS(
  SYSTEM,
  ([o, a, b]) => `${o}=rnd.minmax(${a},${b});`,
  "o,a,b",
  `rnd=op,${SARGS_VV}`,
  "o,a,b"
);
export {
  randMinMaxS,
  randMinMaxS2,
  randMinMaxS3,
  randMinMaxS4,
  randNormDistribS,
  randNormDistribS2,
  randNormDistribS3,
  randNormDistribS4,
  randNormS,
  randNormS2,
  randNormS3,
  randNormS4,
  randomDistribS,
  randomDistribS2,
  randomDistribS3,
  randomDistribS4,
  randomS,
  randomS2,
  randomS3,
  randomS4
};