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<?php |
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|
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namespace TablePress\Matrix\Operators; |
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|
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use TablePress\Matrix\Matrix; |
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use \TablePress\Matrix\Builder; |
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use TablePress\Matrix\Exception; |
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use Throwable; |
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|
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class Multiplication extends Operator |
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{ |
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/** |
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* Execute the multiplication |
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* |
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* @param mixed $value The matrix or numeric value to multiply the current base value by |
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* @throws Exception If the provided argument is not appropriate for the operation |
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* @return $this The operation object, allowing multiple multiplications to be chained |
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**/ |
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public function execute($value, string $type = 'multiplication'): Operator |
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{ |
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if (is_array($value)) { |
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$value = new Matrix($value); |
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} |
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|
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if (is_object($value) && ($value instanceof Matrix)) { |
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return $this->multiplyMatrix($value, $type); |
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} elseif (is_numeric($value)) { |
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return $this->multiplyScalar($value, $type); |
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} |
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|
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throw new Exception("Invalid argument for $type"); |
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} |
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|
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/** |
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* Execute the multiplication for a scalar |
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* |
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* @param mixed $value The numeric value to multiply with the current base value |
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* @return $this The operation object, allowing multiple mutiplications to be chained |
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**/ |
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protected function multiplyScalar($value, string $type = 'multiplication'): Operator |
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{ |
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try { |
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for ($row = 0; $row < $this->rows; ++$row) { |
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for ($column = 0; $column < $this->columns; ++$column) { |
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$this->matrix[$row][$column] *= $value; |
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} |
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} |
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} catch (Throwable $e) { |
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throw new Exception("Invalid argument for $type"); |
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} |
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|
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return $this; |
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} |
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|
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/** |
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* Execute the multiplication for a matrix |
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* |
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* @param TablePress\Matrix $value The numeric value to multiply with the current base value |
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* @return $this The operation object, allowing multiple mutiplications to be chained |
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* @throws Exception If the provided argument is not appropriate for the operation |
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**/ |
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protected function multiplyMatrix(TablePress\Matrix $value, string $type = 'multiplication'): Operator |
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{ |
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$this->validateReflectingDimensions($value); |
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|
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$newRows = $this->rows; |
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$newColumns = $value->columns; |
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$matrix = Builder::createFilledMatrix(0, $newRows, $newColumns) |
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->toArray(); |
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try { |
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for ($row = 0; $row < $newRows; ++$row) { |
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for ($column = 0; $column < $newColumns; ++$column) { |
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$columnData = $value->getColumns($column + 1)->toArray(); |
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foreach ($this->matrix[$row] as $key => $valueData) { |
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$matrix[$row][$column] += $valueData * $columnData[$key][0]; |
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} |
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} |
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} |
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} catch (Throwable $e) { |
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throw new Exception("Invalid argument for $type"); |
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} |
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$this->matrix = $matrix; |
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|
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return $this; |
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} |
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} |
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