pyspark.sql.functions.signum

pyspark.sql.functions.signum(col)

Computes the signum of the given value.

New in version 1.4.0.

Changed in version 3.4.0: Supports Spark Connect.

Parameters

colColumn or column name

target column to compute on.

Returns

Column

the column for computed results.

Examples

>>> import pyspark.sql.functions as sf
>>> spark.range(1).select(
...     sf.signum(sf.lit(-5)),
...     sf.signum(sf.lit(6)),
...     sf.signum(sf.lit(float('nan'))),
...     sf.signum(sf.lit(None))
... ).show()
+----------+---------+-----------+------------+
|SIGNUM(-5)|SIGNUM(6)|SIGNUM(NaN)|SIGNUM(NULL)|
+----------+---------+-----------+------------+
|      -1.0|      1.0|        NaN|        NULL|
+----------+---------+-----------+------------+