/**
  * Convert if possible a supplied argument to a rational
  *
  * @param int|float|string|NumericTypeInterface $value
  *
  * @return \Chippyash\Math\Matrix\RationalNumber
  *
  * @throws \Chippyash\Matrix\Exceptions\MatrixException
  * @throws \Exception
  */
 protected function convertNumberToRational($value)
 {
     if ($value instanceof NumericTypeInterface) {
         return $value->asRational();
     }
     switch (gettype($value)) {
         case 'integer':
             return RationalTypeFactory::create($value, 1);
         case 'double':
             return RationalTypeFactory::fromFloat($value);
         case 'string':
             try {
                 return RationalTypeFactory::fromString($value);
             } catch (\Exception $e) {
                 try {
                     return ComplexTypeFactory::fromString($value)->asRational();
                 } catch (\Exception $ex) {
                     throw new MatrixException('The string representation of the number is invalid for a rational');
                 }
             }
         case 'NULL':
             return RationalTypeFactory::create(0, 1);
         case 'boolean':
             return RationalTypeFactory::create($value ? 1 : 0, 1);
         default:
             throw new MatrixException('Rational expects int, float, string, Rational or NumericTypeInterface ');
     }
 }