theta_intersection

Mengembalikan persimpangan dua representasi biner objek Datasketches ThetaSketch, menggunakan objek Persimpangan Datasketches.

Syntax

from pyspark.sql import functions as sf

sf.theta_intersection(col1, col2)

Parameter-parameternya

Pengaturan	Tipe	Description
col1	pyspark.sql.Column atau str	Sketsa Theta pertama.
col2	pyspark.sql.Column atau str	Sketsa Theta kedua.

Pengembalian Barang

pyspark.sql.Column: Representasi biner dari ThetaSketch yang berpotongan.

Examples

Contoh 1: Dapatkan persimpangan dua sketsa Theta

from pyspark.sql import functions as sf
df = spark.createDataFrame([(1,1),(2,2),(3,2),(3,3)], "struct<v1:int,v2:int>")
df = df.agg(
    sf.theta_sketch_agg("v1").alias("sketch1"),
    sf.theta_sketch_agg("v2").alias("sketch2")
)
df.select(sf.theta_sketch_estimate(sf.theta_intersection(df.sketch1, "sketch2"))).show()

+-----------------------------------------------------------+
|theta_sketch_estimate(theta_intersection(sketch1, sketch2))|
+-----------------------------------------------------------+
|                                                          3|
+-----------------------------------------------------------+