getMessage(); } if ($numObjs < $numInSet) { return ExcelError::NAN(); } $result1 = MathTrig\Factorial::fact($numObjs); if (is_string($result1)) { return $result1; } $result2 = MathTrig\Factorial::fact($numObjs - $numInSet); if (is_string($result2)) { return $result2; } // phpstan thinks result1 and result2 can be arrays; they can't. $result = round($result1 / $result2); // @phpstan-ignore-line return IntOrFloat::evaluate($result); } /** * PERMUTATIONA. * * Returns the number of permutations for a given number of objects (with repetitions) * that can be selected from the total objects. * * @param mixed $numObjs Integer number of different objects * Or can be an array of values * @param mixed $numInSet Integer number of objects in each permutation * Or can be an array of values * * @return array|float|int|string Number of permutations, or a string containing an error * If an array of numbers is passed as an argument, then the returned result will also be an array * with the same dimensions */ public static function PERMUTATIONA($numObjs, $numInSet) { if (is_array($numObjs) || is_array($numInSet)) { return self::evaluateArrayArguments([self::class, __FUNCTION__], $numObjs, $numInSet); } try { $numObjs = StatisticalValidations::validateInt($numObjs); $numInSet = StatisticalValidations::validateInt($numInSet); } catch (Exception $e) { return $e->getMessage(); } if ($numObjs < 0 || $numInSet < 0) { return ExcelError::NAN(); } $result = $numObjs ** $numInSet; return IntOrFloat::evaluate($result); } }