pyspark.sql.functions.stddev_samp

pyspark.sql.functions.stddev_samp(col: ColumnOrName) → pyspark.sql.column.Column

Aggregate function: returns the unbiased sample standard deviation of the expression in a group.

New in version 1.6.0.

Changed in version 3.4.0: Supports Spark Connect.

Parameters

colColumn or str

target column to compute on.

Returns

Column

standard deviation of given column.

Examples

>>> df = spark.range(6)
>>> df.select(stddev_samp(df.id)).first()
Row(stddev_samp(id)=1.87082...)

pyspark.sql.functions.stddev_pop pyspark.sql.functions.sum