pyspark.sql.functions.cos#

pyspark.sql.functions.cos(col)[source]#

Computes cosine of the input column.

New in version 1.4.0.

Changed in version 3.4.0: Supports Spark Connect.

Parameters

colColumn or column name: angle in radians

Returns

Column: cosine of the angle, as if computed by java.lang.Math.cos().

Examples

Example 1: Compute the cosine

>>> from pyspark.sql import functions as sf
>>> spark.sql(
...     "SELECT * FROM VALUES (PI()), (PI() / 4), (PI() / 16) AS TAB(value)"
... ).select("*", sf.cos("value")).show()
+-------------------+------------------+
|              value|        COS(value)|
+-------------------+------------------+
|  3.141592653589...|              -1.0|
| 0.7853981633974...|0.7071067811865...|
|0.19634954084936...|0.9807852804032...|
+-------------------+------------------+

Example 2: Compute the cosine of invalid values

>>> from pyspark.sql import functions as sf
>>> spark.sql(
...     "SELECT * FROM VALUES (FLOAT('NAN')), (NULL) AS TAB(value)"
... ).select("*", sf.cos("value")).show()
+-----+----------+
|value|COS(value)|
+-----+----------+
|  NaN|       NaN|
| NULL|      NULL|
+-----+----------+