Postýlka

Vypočítá kotangens vstupního sloupce. Podporuje Spark Connect.

Odpovídající funkci SQL Databricks vizte funkcecot.

Syntaxe

from pyspark.sql import functions as dbf

dbf.cot(col=<col>)

Parametry

Parameter	Typ	Description
col	pyspark.sql.Column or column name	úhel v radiánech.

Návraty

pyspark.sql.Column: kotangens úhlu.

Examples

from pyspark.sql import functions as dbf
spark.sql("SELECT * FROM VALUES (PI() / 4), (PI() / 16) AS TAB(value)").select("*", dbf.cot("value")).show()

+-------------------+------------------+
|              value|        COT(value)|
+-------------------+------------------+
| 0.7853981633974...|1.0000000000000...|
|0.19634954084936...| 5.027339492125...|
+-------------------+------------------+

from pyspark.sql import functions as dbf
spark.sql("SELECT * FROM VALUES (0.0), (FLOAT('NAN')), (NULL) AS TAB(value)").select("*", dbf.cot("value")).show()

+-----+----------+
|value|COT(value)|
+-----+----------+
|  0.0|  Infinity|
|  NaN|       NaN|
| NULL|      NULL|
+-----+----------+