Rust language bindings for the LIBLINEAR C/C++ library.

Madeesh Kannan

Last update: Sep 22, 2022

Related tags

Machine learning rust machine-learning svm bindings logistic-regression linear-models liblinear

Overview

liblinear-rs

Rust bindings for the liblinear C/C++ library. Provides a thin (but rustic) wrapper around the original C-interface exposed by the library.

Usage

Use the liblinear::Builder API to train a model on sparse features and predict the class of a new instance.

extern crate liblinear;
use liblinear::*;

let x: Vec<Vec<(u32, f64)>> = vec![
        vec![(1, 0.1), (3, 0.2)],
        vec![(3, 9.9)],
        vec![(1, 0.2), (2, 3.2)],
    ];
let y = vec![0.0, 1.0, 0.0];

let mut model_builder = liblinear::Builder::new();
model_builder
    .problem()
    .input_data(util::TrainingInput::from_sparse_features(y, x).unwrap())
    .bias(0f64);
model_builder
    .parameters()
    .solver_type(SolverType::L2R_LR)
    .stopping_criterion(0.1f64)
    .constraints_violation_cost(0.1f64)
    .regression_loss_sensitivity(1f64);

let model = model_builder.build_model().unwrap();
assert_eq!(model.num_classes(), 2);

let predicted_class = model
    .predict(util::PredictionInput::from_sparse_features(vec![(1u32, 2.2f64)]).unwrap())
    .unwrap();
println!(predicted_class);

More examples can be found in the bundled unit tests.

Changelog

1.0.0 - Update liblinear to v230 (breaking changes), minor changes and fixes.
0.1.1 - Added readme, minor documentation fixes.
0.1.0 - Initial release.

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Comments

Failing to link on MacOS
When trying to add liblinear-rs as a dependecy to my rust project I am getting this error

error: linking with `cc` failed: exit code: 1 ... = note: ld: library not found for -lstdc++ clang: error: linker command failed with exit code 1 (use -v to see invocation)

This seems to be because I am compiling on a mac it seems like stdc++ has been deprecated https://stackoverflow.com/questions/51060596/ld-library-not-found-for-lstdc-6
bug
opened by KevinCybura 3