assertInstanceOf(Matrix::class, $matrix); $this->assertEquals([[1], [2], [3], [4]], $matrix->toArray()); $this->assertEquals(4, $matrix->getRows()); $this->assertEquals(1, $matrix->getColumns()); $this->assertEquals($flatArray, $matrix->getColumnValues(0)); } /** * @expectedException \Phpml\Exception\MatrixException */ public function testThrowExceptionOnInvalidColumnNumber() { $matrix = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix->getColumnValues(4); } /** * @expectedException \Phpml\Exception\MatrixException */ public function testThrowExceptionOnGetDeterminantIfArrayIsNotSquare() { $matrix = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix->getDeterminant(); } public function testGetMatrixDeterminant() { //http://matrix.reshish.com/determinant.php $matrix = new Matrix([ [3, 3, 3], [4, 2, 1], [5, 6, 7], ]); $this->assertEquals(-3, $matrix->getDeterminant()); $matrix = new Matrix([ [1, 2, 3, 3, 2, 1], [1 / 2, 5, 6, 7, 1, 1], [3 / 2, 7 / 2, 2, 0, 6, 8], [1, 8, 10, 1, 2, 2], [1 / 4, 4, 1, 0, 2, 3 / 7], [1, 8, 7, 5, 4, 4 / 5], ]); $this->assertEquals(1116.5035, $matrix->getDeterminant(), '', $delta = 0.0001); } public function testMatrixTranspose() { $matrix = new Matrix([ [3, 3, 3], [4, 2, 1], [5, 6, 7], ]); $transposedMatrix = [ [3, 4, 5], [3, 2, 6], [3, 1, 7], ]; $this->assertEquals($transposedMatrix, $matrix->transpose()->toArray()); } /** * @expectedException \Phpml\Exception\InvalidArgumentException */ public function testThrowExceptionOnMultiplyWhenInconsistentMatrixSupplied() { $matrix1 = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix2 = new Matrix([[3, 2, 1], [6, 5, 4]]); $matrix1->multiply($matrix2); } public function testMatrixMultiplyByMatrix() { $matrix1 = new Matrix([ [1, 2, 3], [4, 5, 6], ]); $matrix2 = new Matrix([ [7, 8], [9, 10], [11, 12], ]); $product = [ [58, 64], [139, 154], ]; $this->assertEquals($product, $matrix1->multiply($matrix2)->toArray()); } public function testDivideByScalar() { $matrix = new Matrix([ [4, 6, 8], [2, 10, 20], ]); $quotient = [ [2, 3, 4], [1, 5, 10], ]; $this->assertEquals($quotient, $matrix->divideByScalar(2)->toArray()); } /** * @expectedException \Phpml\Exception\MatrixException */ public function testThrowExceptionWhenInverseIfArrayIsNotSquare() { $matrix = new Matrix([[1, 2, 3], [4, 5, 6]]); $matrix->inverse(); } public function testInverseMatrix() { //http://ncalculators.com/matrix/inverse-matrix.htm $matrix = new Matrix([ [3, 4, 2], [4, 5, 5], [1, 1, 1], ]); $inverseMatrix = [ [0, -1, 5], [1 / 2, 1 / 2, -7 / 2], [-1 / 2, 1 / 2, -1 / 2], ]; $this->assertEquals($inverseMatrix, $matrix->inverse()->toArray(), '', $delta = 0.0001); } public function testCrossOutMatrix() { $matrix = new Matrix([ [3, 4, 2], [4, 5, 5], [1, 1, 1], ]); $crossOuted = [ [3, 2], [1, 1], ]; $this->assertEquals($crossOuted, $matrix->crossOut(1, 1)->toArray()); } }