1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//! The 1R (Holt, 1993) quantization algorithm.
//!
//! Given an attribute contaning numeric data,
//! this code will compute a set of intervals to quantize the values.
//!
//! # Examples
//!
//! ```
//! use oner_quantize::*;
//!
//! // Fake data that has three clear splits:
//! let attribute = vec![ 1, 10, 3, 1, 20, 30, 100];
//! let classes = vec!["a", "b", "a", "a", "b", "b", "c"];
//!
//! // Discover the intervals:
//! let intervals =
//! find_intervals(&attribute, &classes, 2);
//!
//! // We'll find three intervals:
//! // `< 10`, `>= 10 and < 100`, `>= 100`
//! assert_eq!(intervals.len(), 3);
//!
//! // Apply the intervals to an attribute value:
//! assert_eq!(
//! quantize(&intervals, 47),
//! Some( &Interval::Range { from: 10, below: 100, class: "b" } )
//! );
//!```
//!
//! # See also
//!
//! * [oner_induction crate](https://docs.rs/oner_induction) - a Rust implementation of the rule induction algorithm from the 1R paper.
//! * Holte, R.C. (1993) Very Simple Classification Rules Perform Well on Most Commonly Used Datasets. _Machine Learning_ 11: 63. <https://doi.org/10.1023/A:1022631118932>
//! * Nevill-Manning, C. G., Holmes, G. & Witten, I. H.(1995) The development of Holte's 1R Classifier. (Working paper 95/19). Hamilton, New Zealand: University of Waikato, Department of Computer Science. <https://hdl.handle.net/10289/1096>
//!
//! # Licence
//!
//! Copyright 2020 Richard Dallaway
//!
//! This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
//! If a copy of the MPL was not distributed with this file, You can obtain one at <https://mozilla.org/MPL/2.0/>.
pub use Interval;
pub use find_intervals;
pub use quantize;