Function percentile

src/utils/sim3dNormalization.ts:101–108

(arr: number[], p: number)

}

function percentile(arr: number[], p: number): number {
  const sorted = [...arr].sort((a, b) => a - b);
  const idx = p * (sorted.length - 1);
  const lower = Math.floor(idx);
  const upper = Math.ceil(idx);
  if (lower === upper) return sorted[lower];
  return sorted[lower] * (upper - idx) + sorted[upper] * (idx - lower);
}