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<?php
namespace Chippyash\Math\Matrix\Computation\Div;
use Chippyash\Math\Matrix\Computation\AbstractComputation;
use Chippyash\Math\Matrix\NumericMatrix;
use Chippyash\Math\Matrix\Exceptions\ComputationException;
use Chippyash\Math\Matrix\Traits\CreateCorrectMatrixType;
use Chippyash\Math\Matrix\Traits\CreateCorrectScalarType;
use Chippyash\Math\Type\Calculator;
use Chippyash\Type\Number\IntType;
use Chippyash\Type\Number\FloatType;
use Chippyash\Type\Number\Rational\RationalType;
class Scalar extends AbstractComputation
{
use CreateCorrectMatrixType;
use CreateCorrectScalarType;
public function compute(NumericMatrix $mA, $extra = null)
{
if ($mA->is('empty')) {
return $this->createCorrectMatrixType($mA);
}
$scalar = $this->createCorrectScalarType($mA, $extra);
if ($this->isZero($scalar)) {
throw new ComputationException('Divisor == zero');
}
$data = $mA->toArray();
$lx = $mA->columns();
$ly = $mA->rows();
$calc = new Calculator();
for ($row = 0; $row < $ly; $row++) {
for ($col = 0; $col < $lx; $col++) {
$data[$row][$col] = $calc->div($data[$row][$col], $scalar);
}
}
return $this->createCorrectMatrixType($mA, $data);
}
protected function isZero($number)
{
if ($number instanceof IntType || $number instanceof FloatType) {
return ($number() == 0);
}
if ($number instanceof RationalType) {
return ($number->numerator()->get() == 0);
}
return $number->isZero();
}
}