csc

Vypočítá kosekans vstupního sloupce. Podporuje Spark Connect.

Odpovídající funkci SQL Databricks vizte funkcecsc.

Syntaxe

from pyspark.sql import functions as dbf

dbf.csc(col=<col>)

Parametry

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

Návraty

pyspark.sql.Column: kosekans úhlu.

Examples

from pyspark.sql import functions as dbf
spark.sql("SELECT * FROM VALUES (PI() / 2), (PI() / 4) AS TAB(value)").select("*", dbf.csc("value")).show()

+------------------+------------------+
|             value|        CSC(value)|
+------------------+------------------+
|1.5707963267948...|               1.0|
|0.7853981633974...|1.4142135623730...|
+------------------+------------------+

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

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