sek

Vypočítá sekantu vstupního sloupce. Podporuje Spark Connect.

Odpovídající funkci SQL Databricks vizte funkcesec.

Syntaxe

from pyspark.sql import functions as dbf

dbf.sec(col=<col>)

Parametry

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

Návraty

pyspark.sql.Column: Sekans úhlu.

Examples

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

+-------------------+------------------+
|              value|        SEC(value)|
+-------------------+------------------+
| 0.7853981633974...| 1.414213562373...|
|0.19634954084936...|1.0195911582083...|
+-------------------+------------------+

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

+-----+----------+
|value|SEC(value)|
+-----+----------+
|  NaN|       NaN|
| NULL|      NULL|
+-----+----------+