randn

Menghasilkan kolom acak dengan sampel independen dan terdistribusi secara identik (i.i.d.) dari distribusi normal standar. Mendukung Spark Connect.

Untuk fungsi Databricks SQL yang sesuai, lihat randn fungsi.

Syntax

from pyspark.databricks.sql import functions as dbf

dbf.randn(seed=<seed>)

Parameter-parameternya

Pengaturan	Tipe	Description
seed	int (default: None)	Nilai benih untuk generator acak.

Pengembalian Barang

pyspark.sql.Column: Kolom nilai acak.

Examples

from pyspark.databricks.sql import functions as dbf
spark.range(0, 2, 1, 1).select("*", dbf.randn()).show() # doctest: +SKIP

+---+--------------------------+
| id|randn(3968742514375399317)|
+---+--------------------------+
|  0|      -0.47968645355788...|
|  1|       -0.4950952457305...|
+---+--------------------------+

from pyspark.databricks.sql import functions as dbf
spark.range(0, 2, 1, 1).select("*", dbf.randn(seed=42)).show() # doctest: +SKIP

+---+------------------+
| id|         randn(42)|
+---+------------------+
|  0| 2.384479054241...|
|  1|0.1920934041293...|
+---+------------------+