44 lines
1.5 KiB
Rust
44 lines
1.5 KiB
Rust
/// MIT License
|
|
//
|
|
// Copyright (c) 2020 hatoo
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
use std::collections::BTreeMap;
|
|
|
|
pub(crate) fn histogram(values: &[f64], bins: usize) -> Vec<(f64, usize)> {
|
|
assert!(bins >= 2);
|
|
let mut bucket: Vec<usize> = vec![0; bins];
|
|
let min = values.iter().collect::<average::Min>().min();
|
|
let max = values.iter().collect::<average::Max>().max();
|
|
let step = (max - min) / (bins - 1) as f64;
|
|
|
|
for &v in values {
|
|
let i = std::cmp::min(((v - min) / step).ceil() as usize, bins - 1);
|
|
bucket[i] += 1;
|
|
}
|
|
|
|
bucket
|
|
.into_iter()
|
|
.enumerate()
|
|
.map(|(i, v)| (min + step * i as f64, v))
|
|
.collect()
|
|
}
|
|
|
|
pub(crate) fn percentiles(values: &[f64], pecents: &[i32]) -> BTreeMap<String, f64> {
|
|
pecents
|
|
.iter()
|
|
.map(|&p| {
|
|
let i = (f64::from(p) / 100.0 * values.len() as f64) as usize;
|
|
(format!("p{p}"), *values.get(i).unwrap_or(&std::f64::NAN))
|
|
})
|
|
.collect()
|
|
}
|