Unexpected results for multiple quantiles #704
Description
I'm seeing an issue very similar to #262 when using the latest release (v7.8.3). These methods give very different results for the p05 quantile —
import { quantile } from 'simple-statistics';
const a = quantile(data, [0.0, 0.05, 0.5, 0.95, 1.0]);
const b = quantile(data, [0.0, 0.05, 0.95, 1.0]);
const c = [
quantile(data, 0.0),
quantile(data, 0.05),
quantile(data, 0.95),
quantile(data, 1.0)
];For my input data, A and C match, but B[1] is incorrect.
| case | p00 | p05 | p50 | p95 | p100 |
|---|---|---|---|---|---|
| A | 0 | 3,569,032 | 8,370,252 | 11,183,760 | 17,198,303 |
| B | 0 | 8,370,252 ❌ | — | 11,183,760 | 17,198,303 |
| C | 0 | 3,569,032 | — | 11,183,760 | 17,198,303 |
input.json
[
4534264.499853279,
0,
0,
4441655.968117084,
7982031.499157332,
11183760.330270268,
8374531.7466523405,
7537166.851276029,
6408451.109897822,
4858231.646338846,
6409803.519554875,
4296216.572964368,
5367514.3078208575,
6364913.420875475,
8621150.51996475,
9236261.500350267,
7850954.174512796,
6026897.449805159,
3569031.9331034794,
5336662.162307054,
6953168.388225255,
6789669.207787706,
6225885.17604323,
5217135.654872652,
6199349.484675659,
5858452.126622974,
7235692.6957654515,
5129514.715977198,
5161771.078309817,
6488305.210989551,
8371033.429666803,
6753743.962686865,
6595808.546434772,
8505806.597449332,
7272245.97545039,
9785009.118050914,
8023968.06734304,
8370252.207796229,
7616759.566780881,
9758307.209897608,
9549180.910991326,
11536569.38123997,
17198302.677047078
]REPL:
https://svelte.dev/repl/47f4bf4cb3914fad9d8cd1d8bd13ada5?version=3.56.0
I'll look into this further when I can. Thank you!