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Added some more Matrix tests

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This commit is contained in:
Jeff Moser
2010-09-01 08:21:10 -04:00
parent 12417dc874
commit 9325d14bfb
2 changed files with 103 additions and 2 deletions
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4
PHPSkills/Numerics/Matrix.php
View File

@ -105,7 +105,7 @@ class Matrix
// I expand along the first row
for ($currentColumn = 0; $currentColumn < $this->_columnCount; $currentColumn++)
{
$firstRowColValue = $this->_matrixRowValues[0][$currentColumn];
$firstRowColValue = $this->_matrixRowData[0][$currentColumn];
$cofactor = $this->getCofactor(0, $currentColumn);
$itemToAdd = $firstRowColValue*$cofactor;
$result = $result + $itemToAdd;
@ -277,7 +277,7 @@ class Matrix
continue;
}
$result[$currentRow][$currentColumn] = $this->_matrixRowData[$currentRow][$currentColumn];
$result[$actualRow][$actualCol] = $this->_matrixRowData[$currentRow][$currentColumn];
$actualCol++;
}

101
UnitTests/Numerics/MatrixTest.php Normal file
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@ -0,0 +1,101 @@
<?php
require_once 'PHPUnit/Framework.php';
require_once 'PHPUnit/TextUI/TestRunner.php';
require_once(dirname(__FILE__) . '/../../PHPSkills/Numerics/Matrix.php');
use \PHPUnit_Framework_TestCase;
use Moserware\Numerics\SquareMatrix;
class MatrixTest extends PHPUnit_Framework_TestCase
{
public function testTwoByTwoDeterminant()
{
$a = new SquareMatrix(1, 2,
3, 4);
$this->assertEquals(-2, $a->getDeterminant());
$b = new SquareMatrix(3, 4,
5, 6);
$this->assertEquals(-2, $b->getDeterminant());
$c = new SquareMatrix(1, 1,
1, 1);
$this->assertEquals(0, $c->getDeterminant());
$d = new SquareMatrix(12, 15,
17, 21);
$this->assertEquals(12 * 21 - 15 * 17, $d->getDeterminant());
}
public function testThreeByThreeDeterminant()
{
$a = new SquareMatrix(1, 2, 3,
4, 5, 6,
7, 8, 9);
$this->assertEquals(0, $a->getDeterminant());
$pi = new SquareMatrix(3, 1, 4,
1, 5, 9,
2, 6, 5);
// Verified against http://www.wolframalpha.com/input/?i=determinant+%7B%7B3%2C1%2C4%7D%2C%7B1%2C5%2C9%7D%2C%7B2%2C6%2C5%7D%7D
$this->assertEquals(-90, $pi->getDeterminant());
}
public function testFourByFourDeterminant()
{
$a = new SquareMatrix( 1, 2, 3, 4,
5, 6, 7, 8,
9, 10, 11, 12,
13, 14, 15, 16);
$this->assertEquals(0, $a->getDeterminant());
$pi = new SquareMatrix(3, 1, 4, 1,
5, 9, 2, 6,
5, 3, 5, 8,
9, 7, 9, 3);
// Verified against http://www.wolframalpha.com/input/?i=determinant+%7B+%7B3%2C1%2C4%2C1%7D%2C+%7B5%2C9%2C2%2C6%7D%2C+%7B5%2C3%2C5%2C8%7D%2C+%7B9%2C7%2C9%2C3%7D%7D
$this->assertEquals(98, $pi->getDeterminant());
}
public function testEightByEightDeterminant()
{
$a = new SquareMatrix( 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 32,
33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 32, 44, 45, 46, 47, 48,
49, 50, 51, 52, 53, 54, 55, 56,
57, 58, 59, 60, 61, 62, 63, 64);
$this->assertEquals(0, $a->getDeterminant());
$pi = new SquareMatrix(3, 1, 4, 1, 5, 9, 2, 6,
5, 3, 5, 8, 9, 7, 9, 3,
2, 3, 8, 4, 6, 2, 6, 4,
3, 3, 8, 3, 2, 7, 9, 5,
0, 2, 8, 8, 4, 1, 9, 7,
1, 6, 9, 3, 9, 9, 3, 7,
5, 1, 0, 5, 8, 2, 0, 9,
7, 4, 9, 4, 4, 5, 9, 2);
// Verified against http://www.wolframalpha.com/input/?i=det+%7B%7B3%2C1%2C4%2C1%2C5%2C9%2C2%2C6%7D%2C%7B5%2C3%2C5%2C8%2C9%2C7%2C9%2C3%7D%2C%7B2%2C3%2C8%2C4%2C6%2C2%2C6%2C4%7D%2C%7B3%2C3%2C8%2C3%2C2%2C7%2C9%2C5%7D%2C%7B0%2C2%2C8%2C8%2C4%2C1%2C9%2C7%7D%2C%7B1%2C6%2C9%2C3%2C9%2C9%2C3%2C7%7D%2C%7B5%2C1%2C0%2C5%2C8%2C2%2C0%2C9%7D%2C%7B7%2C4%2C9%2C4%2C4%2C5%2C9%2C2%7D%7D
$this->assertEquals(1378143, $pi->getDeterminant());
}
}
$testSuite = new \PHPUnit_Framework_TestSuite();
$testSuite->addTest( new MatrixTest("testFourByFourDeterminant"));
$testSuite->addTest( new MatrixTest("testEightByEightDeterminant"));
\PHPUnit_TextUI_TestRunner::run($testSuite);
?>