Exemplo n.º 1
0
 /**
  * Subtract matrix2 from matrix object on which this method is called
  *
  * @param Matrix $matrix2
  *
  * @return Matrix Note that original matrix is left unchanged
  * @throws \DomainException
  * @throws \InvalidArgumentException
  */
 public function subtract(Matrix $matrix2)
 {
     if ($this->rows !== $matrix2->numRows() || $this->columns !== $matrix2->numColumns()) {
         throw new \DomainException('Matrices are not the same size!');
     }
     $newMatrix = [];
     foreach ($this->mainMatrix as $i => $row) {
         foreach ($row as $j => $column) {
             $newMatrix[$i][$j] = $column - $matrix2->getElementAt($i, $j);
         }
     }
     return new Matrix($newMatrix);
 }