Std

Mängdfunktion: alias för stddev_samp.

Syntax

from pyspark.sql import functions as sf

sf.std(col)

Parameterar

Retur

pyspark.sql.Column: standardavvikelse för angiven kolumn.

Examples

Exempel 1: Beräkna standardavvikelse

from pyspark.sql import functions as sf
spark.range(6).select(sf.std("id")).show()

+------------------+
|           std(id)|
+------------------+
|1.8708286933869...|
+------------------+