jitter = (data, seed) => {
const rng = seedrandom(seed);
console.log(rawDataSize, rawDataOffset, maxTotal, rng());
console.log(data.map(() => -(rng() * rawDataSize + rawDataOffset) * maxTotal / 100));
return data.map(() => -(rng() * rawDataSize + rawDataOffset) * maxTotal / 100);
}