https://github.com/damienpontifex/linearalgebraextensions

Extensions to simplify the use of the LinearAlgebra framework on iOS 8 and OS X 10.10 utilising Swift operator overloading
https://github.com/damienpontifex/linearalgebraextensions

linearalgebra-framework matrix-multiplication swift

Last synced: about 6 hours ago
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Extensions to simplify the use of the LinearAlgebra framework on iOS 8 and OS X 10.10 utilising Swift operator overloading

• Host: GitHub
• URL: https://github.com/damienpontifex/linearalgebraextensions
• Owner: damienpontifex
• License: mit
• Created: 2014-08-03T10:42:31.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-08-20T09:31:02.000Z (about 8 years ago)
• Last Synced: 2024-04-23T14:30:07.980Z (7 months ago)
• Topics: linearalgebra-framework, matrix-multiplication, swift
• Language: Swift
• Size: 404 KB
• Stars: 18
• Watchers: 3
• Forks: 1
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
LinearAlgebraExtensions

=======================

Extensions to simplify the use of the LinearAlgebra framework on iOS 8 and OS X 10.10 utilising Swift operator overloading

## Matrix

Construct a matrix from a Swift Array

```

let twoDArray = [[1.0, 2.0, 3.0], [4.0, 5.0, 6.0], [7.0, 8.0, 9.0]]

var matrix = la_object_t.objectFromArray(twoDArray)

```

## Operators

```

var A: la_object_t

var B: la_object_t

```

Matrix multiplication with operator overloading

```

let C = A * B

```

Matrix multiplication without

```

let C = la_matrix_product(A, B)

```

Matrix element multiplication with operator overloading

```

let C = A * 2

```

Matrix element multiplication without

```

let scalarSplat = la_splat_from_double(rhs, 0)

let C = la_elementwise_product(lhs, scalarSplat)

```

## Matrix Constructors

- [Double] to column matrix

- [Double] to row matrix

- [[Double]] to matrix with size of the contained arrays

- [Double] to matrix of specified row x columns

- Ones matrix

- Zeros matrix

- Repeated values matrix

- Identity matrix

## Matrix Operations

- matrix * matrix : Matrix multiplication

- matrix + matrix : Matrix addition

- matrix - matrix : Matrix subtraction

## Scalar Operations

- matrix * Double : Scalar elementwise multiplication

- matrix + Double : Scalar elementwise addition

- matrix - Double : Scalar elementwise subtraction

- matrix^Double : Scalar elementwise power