vermotr/php-matrix

Matrix basic implementation.

0.1.0 2015-12-01 09:44 UTC

Requires

• php: >=5.4.0

Requires (Dev)

• phpunit/phpunit: ~4.0

MIT

• Romain Vermot

• math
• linear-algebra
• matrix

README

Matrix basic implementation.

Installation

composer require vermotr/php-matrix:0.1.0

Alternatively you can add the following to the require section of your composer.json manually:

"vermotr/php-matrix": "0.1.0"

Usage

There are three ways to instantiate a matrix:

use vermotr\Math\Matrix;

// Create a Matrix with its size
$matrix = new Matrix(4, 2);

// With a bi-dimensional array
$matrix = new Matrix([
    [0, 1, 2],
    [3, 4, 5],
    [6, 7, 8]
]);

// With another Matrix
$matrix = new Matrix($anotherMatrix);

You can access each element like a bi-dimensional array and display the matrix like so:

$matrix[4][2] = 42;

echo $matrix;

To know the matrix' size, you have access to two getters:

$matrix->getRows();
$matrix->getCols();

In this class, you will find basic operations: add, subtract and multiply (by scalars and Matrices):

$addedScalar = $matrix->add(4);
$addedMatrix = $matrix->add($anotherMatrix);
$subtractedScalar = $matrix->subtract(2);
$subtractedMatrix = $matrix->subtract($anotherMatrix);
$multipliedByScalar = $matrix->multiply(2);
$multipliedByMatrix = $matrix->multiply($anotherMatrix);

You can also compare two matrices with the equals method:

if ($matrix1->equals($matrix2)) {
    // Do something!
}

There are some useful methods implemented in this class:

$matrix->adjugate();
$matrix->cofactor();
$matrix->determinant();
$matrix->inverse();
$matrix->subMatrix();
$matrix->transpose();

Changelog

• 0.1.0
  • Created the Matrix type
  • Scalar Addition
  • Matrix Addition
  • Scalar Subtraction
  • Matrix Subtraction
  • Scalar Multiplication
  • Matrix Multiplication
  • Adjugate
  • Cofactor
  • Determinant
  • Inverse
  • Submatrix
  • Transpose