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Returns the unbiased sample standard deviation of the expression in a group.
Syntax
from pyspark.sql import functions as sf
sf.stddev_samp(col)
Parameters
| Parameter | Type | Description |
|---|---|---|
col |
pyspark.sql.Column or column name |
Target column to compute on. |
Returns
pyspark.sql.Column: standard deviation of given column.
Examples
import pyspark.sql.functions as sf
spark.range(6).select(sf.stddev_samp("id")).show()
+------------------+
| stddev_samp(id)|
+------------------+
|1.8708286933869...|
+------------------+