SciGo 🚀

SciGo's official mascot - Ready, Set, SciGo!

The blazing-fast scikit-learn compatible ML library for Go

Say "Goodbye" to slow ML, "Sci-Go" to fast learning!

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🌟 Why SciGo?

SciGo = Statistical Computing In Go

SciGo brings the power and familiarity of scikit-learn to the Go ecosystem, offering:

• 🔥 Blazing Fast: Native Go implementation with built-in parallelization
• 🎯 scikit-learn Compatible: Familiar Fit/Predict API for easy migration
• 🌲 LightGBM Support: Full compatibility with Python LightGBM models (.txt/JSON/string)
• 📖 Well Documented: Complete API documentation with examples on pkg.go.dev
• 🌊 Streaming Support: Online learning algorithms for real-time data
• 🚀 Zero Heavy Dependencies: Pure Go implementation (only scientific essentials)
• 📊 Comprehensive: Regression, classification, clustering, tree-based models, and more
• 🧪 Production Ready: Extensive tests, benchmarks, and error handling
• ⚡ Superior to leaves: Not just inference - full training, convenience features, and numerical precision

📦 Installation

Go Module (Recommended)

go get github.com/YuminosukeSato/scigo@latest

Quick Start Options

• 🐳 Docker: docker run --rm -it ghcr.io/yuminosukesato/scigo:latest
• ☁️ GitPod:
• 📦 Go Install: go install github.com/YuminosukeSato/scigo/examples/quick-start@latest

🚀 Quick Start

💡 Tip: For complete API documentation with examples, visit pkg.go.dev/scigo

Option 1: One-Liner with LightGBM 🌲

package main

import (
    "github.com/YuminosukeSato/scigo/sklearn/lightgbm"
    "gonum.org/v1/gonum/mat"
)

func main() {
    // Super convenient one-liner training!
    X := mat.NewDense(100, 4, data) // Your data
    y := mat.NewDense(100, 1, labels) // Your labels
    
    // Train and predict in one line!
    result := lightgbm.QuickTrain(X, y)
    predictions := result.Predict(X_test)
    
    // Or use AutoML for automatic tuning
    best := lightgbm.AutoFit(X, y)
    
    // Load Python LightGBM models directly!
    model := lightgbm.NewLGBMClassifier()
    model.LoadModel("python_model.txt") // Full compatibility!
    predictions, _ := model.Predict(X_test)
}

Option 2: Classic Linear Regression

package main

import (
    "fmt"
    "log"
    
    "github.com/YuminosukeSato/scigo/linear"
    "gonum.org/v1/gonum/mat"
)

func main() {
    // Create and train model - just like scikit-learn!
    model := linear.NewLinearRegression()
    
    // Training data
    X := mat.NewDense(4, 2, []float64{
        1, 1,
        1, 2,
        2, 2,
        2, 3,
    })
    y := mat.NewDense(4, 1, []float64{
        2, 3, 3, 4,
    })
    
    // Fit the model
    if err := model.Fit(X, y); err != nil {
        log.Fatal(err)
    }
    
    // Make predictions
    XTest := mat.NewDense(2, 2, []float64{
        1.5, 1.5,
        2.5, 3.5,
    })
    predictions, _ := model.Predict(XTest)
    
    fmt.Println("Ready, Set, SciGo! Predictions:", predictions)
}

📚 API Documentation

📖 Package Documentation

Package	Description	Go Doc
sklearn/lightgbm 🌲	LightGBM with Python model compatibility & convenience features
sklearn/linear_model	Linear models with full scikit-learn compatibility
preprocessing	Data preprocessing utilities (StandardScaler, MinMaxScaler, OneHotEncoder)
linear	Linear machine learning algorithms (LinearRegression)
metrics	Model evaluation metrics (MSE, RMSE, MAE, R², MAPE)
core/model	Base model with weight export/import and scikit-learn compatibility

📋 Complete API Examples

The documentation includes comprehensive examples for all major APIs. Visit the Go Doc links above or use go doc locally:

# View package documentation
go doc github.com/YuminosukeSato/scigo/preprocessing
go doc github.com/YuminosukeSato/scigo/linear
go doc github.com/YuminosukeSato/scigo/metrics

# View specific function documentation
go doc github.com/YuminosukeSato/scigo/preprocessing.StandardScaler.Fit
go doc github.com/YuminosukeSato/scigo/linear.LinearRegression.Predict
go doc github.com/YuminosukeSato/scigo/metrics.MSE

# Run example tests
go test -v ./preprocessing -run Example
go test -v ./linear -run Example
go test -v ./metrics -run Example

📚 Algorithms

Supervised Learning

Linear Models

• ✅ Linear Regression - Full scikit-learn compatible implementation with QR decomposition
• ✅ SGD Regressor - Stochastic Gradient Descent for large-scale learning
• ✅ SGD Classifier - Linear classifiers with SGD training
• ✅ Passive-Aggressive - Online learning for classification and regression

Data Preprocessing

• ✅ StandardScaler - Standardizes features by removing mean and scaling to unit variance
• ✅ MinMaxScaler - Scales features to a given range (e.g., [0,1] or [-1,1])
• ✅ OneHotEncoder - Encodes categorical features as one-hot numeric arrays

Tree-based Models

• ✅ LightGBM - Full Python model compatibility (.txt/JSON/string formats)
  • LGBMClassifier - Binary and multiclass classification
  • LGBMRegressor - Regression with multiple objectives
  • QuickTrain - One-liner training with automatic model selection
  • AutoFit - Automatic hyperparameter tuning
  • Superior to leaves - training + convenience features
• 🚧 Random Forest (Coming Soon)
• 🚧 XGBoost compatibility (Coming Soon)

Unsupervised Learning

Clustering

• ✅ MiniBatch K-Means - Scalable K-Means for large datasets
• 🚧 DBSCAN (Coming Soon)
• 🚧 Hierarchical Clustering (Coming Soon)

Special Features

Online Learning & Streaming

• ✅ Incremental Learning - Update models with new data batches
• ✅ Partial Fit - scikit-learn compatible online learning
• ✅ Concept Drift Detection - DDM and ADWIN algorithms
• ✅ Streaming Pipelines - Real-time data processing with channels

🎯 scikit-learn Compatibility

SciGo implements the familiar scikit-learn API with full compatibility:

// Just like scikit-learn!
model.Fit(X, y)              // Train the model
model.Predict(X)              // Make predictions  
model.Score(X, y)             // Evaluate the model
model.PartialFit(X, y)        // Incremental learning

// New in v0.3.0 - Full scikit-learn compatibility
model.GetParams(deep)         // Get model parameters
model.SetParams(params)       // Set model parameters
weights, _ := model.ExportWeights()  // Export model weights
model.ImportWeights(weights)  // Import with guaranteed reproducibility

// Streaming - unique to Go!
model.FitStream(ctx, dataChan) // Streaming training

🆕 New Features in v0.3.0

• Complete Weight Reproducibility - Guaranteed identical outputs with same weights
• gRPC/Protobuf Support - Distributed training and prediction
• Full Parameter Management - GetParams/SetParams for all models
• Model Serialization - Export/Import with full precision

📊 Performance Benchmarks

SciGo leverages Go's concurrency for exceptional performance:

Algorithm	Dataset Size	SciGo	scikit-learn (Python)	Speedup
Linear Regression	1M×100	245ms	890ms	3.6×
SGD Classifier	500K×50	180ms	520ms	2.9×
MiniBatch K-Means	100K×20	95ms	310ms	3.3×
Streaming SGD	1M streaming	320ms	1.2s	3.8×

Benchmarks on MacBook Pro M2, 16GB RAM

Memory Efficiency

Dataset Size	Memory	Allocations
100×10	22.8KB	22
1,000×10	191.8KB	22
10,000×20	3.4MB	57
50,000×50	41.2MB	61

🏗️ Architecture

scigo/
├── linear/           # Linear models
├── sklearn/          # scikit-learn compatible implementations
│   ├── linear_model/ # SGD, Passive-Aggressive
│   ├── cluster/      # Clustering algorithms
│   └── drift/        # Concept drift detection
├── metrics/          # Evaluation metrics
├── core/            # Core abstractions
│   ├── model/       # Base model interfaces
│   ├── tensor/      # Tensor operations
│   └── parallel/    # Parallel processing
├── datasets/        # Dataset utilities
└── examples/        # Usage examples

📊 Metrics

Comprehensive evaluation metrics with full documentation:

• Regression Metrics:
  • MSE (Mean Squared Error) - pkg.go.dev/metrics.MSE
  • RMSE (Root Mean Squared Error) - pkg.go.dev/metrics.RMSE
  • MAE (Mean Absolute Error) - pkg.go.dev/metrics.MAE
  • R² (Coefficient of Determination) - pkg.go.dev/metrics.R2Score
  • MAPE (Mean Absolute Percentage Error) - pkg.go.dev/metrics.MAPE
  • Explained Variance Score - pkg.go.dev/metrics.ExplainedVarianceScore
• Classification: Accuracy, Precision, Recall, F1-Score, ROC-AUC (coming)
• Clustering: Silhouette Score, Davies-Bouldin Index (coming)

🧪 Testing & Quality

# Run tests
go test ./...

# Run benchmarks
go test -bench=. -benchmem ./...

# Check coverage (76.7% overall coverage)
go test -cover ./...

# Run linter (errcheck, govet, ineffassign, staticcheck, unused, misspell)
make lint-full

# Run examples to see API usage
go test -v ./preprocessing -run Example
go test -v ./linear -run Example
go test -v ./metrics -run Example
go test -v ./core/model -run Example

Quality Gates

• ✅ Test Coverage: 76.7% (target: 70%+)
• ✅ Linting: golangci-lint with comprehensive checks
• ✅ Documentation: Complete godoc for all public APIs
• ✅ Examples: Comprehensive example functions for all major APIs

📚 Examples

Check out the examples directory:

• Linear Regression - Basic regression
• Streaming Learning - Online learning demo
• Iris Classification - Classic dataset
• Error Handling - Robust error management

🤝 Contributing

We welcome contributions! Please see our Contributing Guide.

Development Setup

# Clone the repository
git clone https://github.com/YuminosukeSato/scigo.git
cd scigo

# Install dependencies
go mod download

# Run tests
go test ./...

# Run linter
golangci-lint run

🚀 Continuous Delivery (CD)

SciGo uses automated continuous delivery for releases:

• Automatic Release: Every push to the main branch triggers an automatic patch version release
• Version Management: Versions are automatically incremented (e.g., 0.4.0 → 0.4.1)
• Release Assets: Binaries for Linux, macOS, and Windows are automatically built and attached
• Docker Images: Docker images are automatically built and pushed to GitHub Container Registry (ghcr.io)
• Documentation: pkg.go.dev is automatically updated with the latest version

Release Process

1. Merge PR to main: When a PR is merged to main branch
2. Automatic Tests: CI runs all tests and coverage checks
3. Version Bump: Patch version is automatically incremented
4. Create Release: GitHub Release is created with:
   • Multi-platform binaries (Linux, macOS, Windows)
   • Release notes from CHANGELOG.md
   • Docker image at ghcr.io/yuminosukesato/scigo:VERSION
5. Post-Release: An issue is created to track post-release verification tasks

Manual Release

For major or minor version releases, create and push a tag manually:

git tag v0.5.0 -m "Release v0.5.0"
git push origin v0.5.0

This will trigger the release workflow via the existing release.yml workflow.

🗺️ Roadmap

Phase 1: Core ML (Current)

• ✅ Linear models
• ✅ Online learning
• ✅ Basic clustering
• 🚧 Tree-based models

Phase 2: Advanced Features

• Neural Networks (MLP)
• Deep Learning integration
• Model serialization (ONNX export)
• GPU acceleration

Phase 3: Enterprise Features

• Distributed training
• AutoML capabilities
• Model versioning
• A/B testing framework

📖 Documentation

Core Documentation

• API Documentation - Complete API reference with examples
• Package Index - Browse all packages

API Quick Reference

API	Package	Documentation
StandardScaler	preprocessing	pkg.go.dev/preprocessing.StandardScaler
MinMaxScaler	preprocessing	pkg.go.dev/preprocessing.MinMaxScaler
OneHotEncoder	preprocessing	pkg.go.dev/preprocessing.OneHotEncoder
LinearRegression	linear	pkg.go.dev/linear.LinearRegression
BaseEstimator	core/model	pkg.go.dev/model.BaseEstimator

Migration & Advanced Guides

• 📚 scikit-learn Migration Guide - Complete guide for Python developers
• 🏗️ API Stability Analysis - v1.0.0 roadmap and compatibility
• 🌊 Streaming Guide (Coming Soon)
• ⚡ Performance Tuning (Coming Soon)

🙏 Acknowledgments

• Inspired by scikit-learn
• Built with Gonum
• Error handling by CockroachDB errors

📄 License

SciGo is licensed under the MIT License. See LICENSE for details.

📧 Contact

• Author: Yuminosuke Sato
• GitHub: @YuminosukeSato
• Repository: https://github.com/YuminosukeSato/scigo
• Issues: GitHub Issues

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🚀 Ready, Set, SciGo! 🚀

Where Science Meets Go - Say goodbye to slow ML!

Made with ❤️ and lots of ☕ in Go

### Running scikit-learn parity tests

Development-only parity tests compare the Go implementation against scikit-learn outputs. They are not part of the default go test; use the parity build tag explicitly.

Steps

1. Generate golden data
   • Use uv instead of pip.
   • Command: uv run --with scikit-learn --with numpy --with scipy python scripts/golden/gen_logreg.py
2. Run parity tests
   • Command: go test ./sklearn/linear_model -tags=parity -run Parity -v

One-liner

make parity-linear

Notes

• Current LogisticRegression uses simplified gradient descent. After implementing lbfgs/newton-cg, tolerances will be tightened.
• Golden file is written to tests/golden/logreg_case1.json.