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First Matrix unit test

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This commit is contained in:
Jeff Moser 2010-08-31 22:24:05 -04:00
parent a7fd0aab5e
commit 12417dc874
1 changed files with 28 additions and 55 deletions
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69
PHPSkills/Numerics/Matrix.php
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@ -9,34 +9,13 @@ class Matrix
private $_rowCount;
private $_columnCount;
public function __construct($rows = 0, $columns = 0, $allRowValues = null)
public function __construct($rows = 0, $columns = 0, $matrixData = null)
{
$this->_rowCount = $rows;
$this->_columnCount = $columns;
$currentIndex = 0;
$this->_matrixRowData = array();
for($currentRow; $currentRow < $rows; $currentRow++)
{
$currentRowData = array();
$this->_matrixRowData[] = $currentRowData;
for($currentCol = 0; $currentCol < $columns; $currentCol++)
{
$currentRowData[] = ($allRowValues != null) ? $allRowValues[$currentIndex++] : 0;
}
}
$this->_matrixRowData = $matrixData;
}
public static function fromRowValues(&$rowValues)
{
$result = new Matrix();
$result->_matrixRowData = $rowValues;
$result->_rowCount = count($rowValues);
$result->_columnCount = count($rowValues[0]);
return $result;
}
public function getRowCount()
{
@ -74,7 +53,7 @@ class Matrix
$currentColumnTransposeMatrix < $this->_rowCount;
$currentColumnTransposeMatrix++)
{
$transposeMatrixCurrentRowColumnValues[$currentColumnTransposeMatrix] =
$transposeMatrix[$currentRowTransposeMatrix][$currentColumnTransposeMatrix] =
$this->_matrixRowData[$currentColumnTransposeMatrix][$currentRowTransposeMatrix];
}
}
@ -84,7 +63,7 @@ class Matrix
private function isSquare()
{
return ($this->_rowCount == $this->_column) && ($this->_rowCount > 0);
return ($this->_rowCount == $this->_columnCount) && ($this->_rowCount > 0);
}
public function getDeterminant()
@ -167,12 +146,9 @@ class Matrix
for ($currentColumn = 0; $currentColumn < $this->_columns; $currentColumn++)
{
$currentColumnData = array();
$result[] = $currentColumnData;
for ($currentRow = 0; $currentRow < $this->_rowCount; $currentRow++)
{
$currentColumnData[$currentRow] = $this->getCofactor($currentRow, $currentColumn);
$result[$currentColumn][$currentRow] = $this->getCofactor($currentRow, $currentColumn);
}
}
@ -202,12 +178,9 @@ class Matrix
for ($currentRow = 0; $currentRow < $rows; $currentRow++)
{
$newRowColumnValues = array();
$newValues[$currentRow] = $newRowColumnValues;
for ($currentColumn = 0; $currentColumn < $columns; $currentColumn++)
{
$newRowColumnValues[$currentColumn] = $scalarValue*$matrix->getValue(currentRow, currentColumn);
$newValues[$currentRow][$currentColumn] = $scalarValue*$matrix->getValue($currentRow, $currentColumn);
}
}
@ -231,11 +204,10 @@ class Matrix
for ($currentRow = 0; $currentRow < $left->getRowCount(); $currentRow++)
{
$rowColumnValues = array();
$resultMatrix[$currentRow] = $rowColumnValues;
for ($currentColumn = 0; $currentColumn < $right->getColumnCount(); $currentColumn++)
{
$rowColumnValues[$currentColumn] = $left->getValue($currentRow, $currentColumn)
$resultMatrix[$currentRow][$currentColumn] =
$left->getValue($currentRow, $currentColumn)
+
$right->getValue($currentRow, $currentColumn);
}
@ -261,9 +233,6 @@ class Matrix
for ($currentRow = 0; $currentRow < $resultRows; $currentRow++)
{
$currentRowValues = array();
$resultMatrix[$currentRow] = $currentRowValues;
for ($currentColumn = 0; $currentColumn < $resultColumns; $currentColumn++)
{
$productValue = 0;
@ -276,7 +245,7 @@ class Matrix
$productValue = $productValue + $vectorIndexProduct;
}
$resultMatrix[] = $productValue;
$resultMatrix[$currentRow][$currentColumn] = $productValue;
}
}
@ -290,6 +259,8 @@ class Matrix
// I'm going to use a horribly naïve algorithm... because I can :)
$result = array();
$actualRow = 0;
for ($currentRow = 0; $currentRow < $this->_rowCount; $currentRow++)
{
if ($currentRow == $rowToRemove)
@ -297,8 +268,7 @@ class Matrix
continue;
}
$columnData = array();
$result[] = $columnData;
$actualCol = 0;
for ($currentColumn = 0; $currentColumn < $this->_columnCount; $currentColumn++)
{
@ -307,8 +277,12 @@ class Matrix
continue;
}
$columnData[] = $this->_matrixRowData[$currentRow][$currentColumn];
$result[$currentRow][$currentColumn] = $this->_matrixRowData[$currentRow][$currentColumn];
$actualCol++;
}
$actualRow++;
}
return new Matrix($this->_rowCount - 1, $this->_columnCount - 1, $result);
@ -342,21 +316,20 @@ class Vector extends Matrix
class SquareMatrix extends Matrix
{
public function __construct(array $allValues)
public function __construct()
{
$allValues = \func_get_args();
$rows = (int) sqrt(count($allValues));
$cols = $rows;
$matrixData = array();
$allValuesIndex = 0;
for ($currentRow = 0; $currentRow < $rows; $currentRow++)
{
$currentRowValues = array();
$matrixData[] = currentRowValues;
for ($currentColumn = 0; $currentColumn < $cols; $currentColumn++)
{
$currentRowValues[] = $allValues[$allValuesIndex++];
$matrixData[$currentRow][$currentColumn] = $allValues[$allValuesIndex++];
}
}