public function stdDevSamp($expression1, ...$expressions) : self
    {
        $this->expr->stdDevSamp(empty($expressions) ? $expression1 : func_get_args());

        return $this;
    }
public function stdDevSamp($expression1, ...$expressions) : self
    {
        $this->expr->stdDevSamp(empty($expressions) ? $expression1 : func_get_args());

        return $this;
    }
public function stdDevSamp ( $ expression1 , ... $ expressions ) : self { $ this -> expr -> stdDevSamp ( empty ( $ expressions ) ? $ expression1 : func_get_args ( ) ) ; return $ this ; }
Calculates the sample standard deviation of the input values.

The argument can be any expression as long as it resolves to an array.

@see https://docs.mongodb.org/manual/reference/operator/aggregation/stdDevSamp/
@see Expr::stdDevSamp

@param mixed|Expr $expression1
@param mixed|Expr ...$expressions Additional expressions
Calculates the sample standard deviation of the input values .