PHP LL_Matrix::determinant示例

示例#1

文件： matrix_test.php 项目： vinamilvinamil/Learning-Library-for-PHP

 public function testDeterminant()
 {
     $matrix = new LL_Matrix(array(array(5, 7), array(2, -3)));
     $result = $matrix->determinant();
     $this->assertEquals($result, -29);
     $matrix = new LL_Matrix(array(array(7, 4, 2, 0), array(6, 3, -1, 2), array(4, 6, 2, 5), array(8, 2, -7, 1)));
     // this tests a series of subdeterminants (and cofactor matrices)
     $result = $matrix->determinant();
     $this->assertEquals($result, -279);
     $matrix = new LL_Matrix(array(array(-2, 3), array(5, 0.5)));
     $result = $matrix->determinant();
     $this->assertEquals($result, -16);
     $matrix = new LL_Matrix(array(array(2, -2, 0), array(-1, 5, 1), array(3, 4, 5)));
     $result = $matrix->determinant();
     $this->assertEquals($result, 26);
 }