MathPHP\LinearAlgebra\Matrix::__construct PHP Method

    public function __construct(array $A)
    {
        $this->A = $A;
        $this->m = count($A);
        $this->n = $this->m > 0 ? count($A[0]) : 0;
        foreach ($A as $i => $row) {
            if (count($row) !== $this->n) {
                throw new Exception\BadDataException("Row {$i} has a different column count: " . count($row) . "; was expecting {$this->n}.");
            }
        }
    }