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Returns the base-2 logarithm of the argument. Supports Spark Connect.
For the corresponding Databricks SQL function, see log2 function.
Syntax
from pyspark.databricks.sql import functions as dbf
dbf.log2(col=<col>)
Parameters
| Parameter | Type | Description |
|---|---|---|
col |
pyspark.sql.Column or str |
A column to calculate logarithm for. |
Returns
pyspark.sql.Column: logariphm of given value.
Examples
from pyspark.databricks.sql import functions as dbf
spark.range(10).select("*", dbf.log2('id')).show()
+---+------------------+
| id| LOG2(id)|
+---+------------------+
| 0| NULL|
| 1| 0.0|
| 2| 1.0|
| 3| 1.584962500721...|
| 4| 2.0|
| 5| 2.321928094887...|
| 6| 2.584962500721...|
| 7| 2.807354922057...|
| 8| 3.0|
| 9|3.1699250014423...|
+---+------------------+