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La
A library for linear algebra with type-safety written in Swift.
Motivations
- Type-safety: Detect undefined operations in compile time.
- Performance: Use highly-optimized implementations for the backend.
Examples
La rejects undefined operations in compile-time:
import La
import LaAccelerate
enum _2: Size { static let value: Int32 = 2 }
enum _3: Size { static let value: Int32 = 3 }
let a = Matrix<_2, _3, Double>([
0, 1, 2,
3, 4, 5,
])!
let b = Matrix<_2, _3, Double>([
0, 1, 2,
3, 4, 5,
])!
let c = Matrix<_3, _2, Double>([
0, 1,
2, 3,
4, 5,
])!
_ = a + b // OK.
_ = a + c // This casuese a compile-tim error because the size of `a` is not same as the one of `c`.You can decide sizes in run-time with lazy-evaluation based on input such as environment variables or files:
import Foundation
import La
enum N: Size {
// Constants defined with `statc let` are lazily-evaluated in Swift.
static let value: Int32 = Int(ProcessInfo.processInfo.environment["MATRIX_SIZE_M"])!
}
// `N.value` is decided here in run-time.
_ = Matrix<_1, N, Double>.zeros() // 1 x N zero matrixInstallation
Swift Pacakge Manager
Add La and LaAccelerate into dependencies:
// Package.swift
import PackageDescription
let package = Package(
name: "YourPackage",
dependencies: [
.Package(url: "https://github.com/mitsuse/la", majorVersion: 0, minor: 6),
.Package(url: "https://github.com/mitsuse/la-accelerate", majorVersion: 0, minor: 6),
]
)CocoaPods
Add the following lines into your Podfile:
source 'https://github.com/mitsuse/pods-la.git'
Pod 'La', '~> 0.6.1'
Pod 'LaAccelerate', '~> 0.6.1'Matrix Operations
La doesn't provide the implementation of matrix operations. This package just provides a matrix type and the interface of operations.
You need to import one of implementations for matrix operations:
- la-accelerate: Accelerate (Apple's BLAS)
- la-openblas (under development): OpenBLAS
License
The content of this repository are licensed under the MIT License unless otherwise noted. Please read LICENSE for the detail.