cume_dist

Window 函数：返回窗口分区中值的累积分布，即当前行下方的行的分数。

Syntax

from pyspark.sql import functions as sf

sf.cume_dist()

参数

此函数不采用任何参数。

退货

pyspark.sql.Column：用于计算累积分布的列。

例子

from pyspark.sql import functions as sf
from pyspark.sql import Window
df = spark.createDataFrame([1, 2, 3, 3, 4], "int")
w = Window.orderBy("value")
df.withColumn("cd", sf.cume_dist().over(w)).show()

+-----+---+
|value| cd|
+-----+---+
|    1|0.2|
|    2|0.4|
|    3|0.8|
|    3|0.8|
|    4|1.0|
+-----+---+