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