|
public static inconsistentMatrixSupplied ( ) : |
||
| 리턴 | ||
/**
* @param Matrix $matrix
*
* @return Matrix
*
* @throws InvalidArgumentException
*/
public function multiply(Matrix $matrix)
{
if ($this->columns != $matrix->getRows()) {
throw InvalidArgumentException::inconsistentMatrixSupplied();
}
$product = [];
$multiplier = $matrix->toArray();
for ($i = 0; $i < $this->rows; ++$i) {
$columns = $matrix->getColumns();
for ($j = 0; $j < $columns; ++$j) {
$product[$i][$j] = 0;
for ($k = 0; $k < $this->columns; ++$k) {
$product[$i][$j] += $this->matrix[$i][$k] * $multiplier[$k][$j];
}
}
}
return new self($product, false);
}
