https://github.com/ocelotko/elo

A simple and efficient Rust library for calculating Elo ratings. Provides functions for probability calculation and Elo rating updates.
https://github.com/ocelotko/elo

algorithm elo lib library rust

Last synced: about 2 months ago
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A simple and efficient Rust library for calculating Elo ratings. Provides functions for probability calculation and Elo rating updates.

• Host: GitHub
• URL: https://github.com/ocelotko/elo
• Owner: ocelotko
• License: mit
• Created: 2025-04-02T07:10:12.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2025-04-04T09:26:04.000Z (6 months ago)
• Last Synced: 2025-04-04T10:29:10.543Z (6 months ago)
• Topics: algorithm, elo, lib, library, rust
• Language: Rust
• Homepage:
• Size: 4.88 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Elo Algorithm in Rust

This library provides an implementation of the **Elo rating system** in Rust. It is a simple, efficient way to calculate the Elo ratings of two players based on the outcome of a match.

## Usage

Here’s a basic example showing how to use this library:

```rust

use elo::{probability, elo_rating};

fn main() {

    let player_a_rating = 1500.0;

    let player_b_rating = 1600.0;

    let k_factor = 32; // Adjust K-factor as needed

    // Calculate the probability of player A winning

    let prob_a = probability(player_a_rating, player_b_rating);

    println!("Probability of player A winning: {}", prob_a);

    // Simulate a game where player A wins (outcome = 1.0)

    let outcome = 1.0;

    let (new_a_rating, new_b_rating) = elo_rating(player_a_rating, player_b_rating, k_factor, outcome);

    println!("New player A rating: {}", new_a_rating);

    println!("New player B rating: {}", new_b_rating);

    // Simulate a game where player B wins (outcome = 0.0)

    let outcome_b = 0.0;

    let (new_a_rating_b, new_b_rating_b) = elo_rating(player_a_rating, player_b_rating, k_factor, outcome_b);

    println!("New player A rating when B wins: {}", new_a_rating_b);

    println!("New player B rating when B wins: {}", new_b_rating_b);

    // Simulate a draw (outcome = 0.5)

    let outcome_draw = 0.5;

    let (new_a_rating_draw, new_b_rating_draw) = elo_rating(player_a_rating, player_b_rating, k_factor, outcome_draw);

    println!("New player A rating when Draw: {}", new_a_rating_draw);

    println!("New player B rating when Draw: {}", new_b_rating_draw);

}