factorial()
Описание
Функция factorial() вычисляет факториал числа (n!). Факториал числа n - это произведение всех положительных целых чисел от 1 до n.
Параметры
column: Column - целочисленный столбец
Возвращаемое значение
Column - факториал числа
Пример использования
from pyspark.sql import SparkSession
from pyspark.sql.functions import factorial, col
# Создаем SparkSession
spark = SparkSession.builder.appName("factorial_example").getOrCreate()
# Создаем DataFrame с числами
data = [
(0,),
(1,),
(2,),
(3,),
(4,)
]
df = spark.createDataFrame(data, ["number"])
# Вычисляем факториалы
result = df.select(
"number",
factorial(col("number")).alias("factorial")
).show()
# Результат:
# +------+---------+
# |number|factorial|
# +------+---------+
# | 0| 1|
# | 1| 1|
# | 2| 2|
# | 3| 6|
# | 4| 24|
# +------+---------+
Примечания
- Факториал 0 равен 1
- Факториал отрицательных чисел не определен
- Для больших чисел может произойти переполнение
- Функция работает только с целыми числами
- Для других математических операций используйте
pow(),sqrt()
XML функции
aggregate functions
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array functions pyspark
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basic functions
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bitwise functions
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call functions
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normal functions
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sketch functions
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string functions pyspark
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struct functions
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type functions
window functions
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xml functions
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агрегатные функции
битовые операции
оконные функции
- diff(col)
- session_window(timeColumn, gapDuration)
- sliding_window(timeColumn, windowDuration, slideDuration)
- tumbling_window(timeColumn, windowDuration)