cos
Calcule le cosinus de la colonne d'entrée. Prend en charge Spark Connect.
Pour la fonction Databricks SQL correspondante, consultez la fonctioncos.
Syntaxe
Python
from pyspark.sql import functions as dbf
dbf.cos(col=<col>)
parameter
parameter | Type | Description |
|---|---|---|
|
| angle en radians |
Renvoie
pyspark.sql.Column: cosinus de l'angle, comme si calculé par java.lang.Math.cos().
Exemples
Python
from pyspark.sql import functions as dbf
spark.sql("SELECT * FROM VALUES (PI()), (PI() / 4), (PI() / 16) AS TAB(value)").select("*", dbf.cos("value")).show()
Output
+-------------------+------------------+
| value| COS(value)|
+-------------------+------------------+
| 3.141592653589...| -1.0|
| 0.7853981633974...|0.7071067811865...|
|0.19634954084936...|0.9807852804032...|
+-------------------+------------------+
Python
from pyspark.sql import functions as dbf
spark.sql("SELECT * FROM VALUES (FLOAT('NAN')), (NULL) AS TAB(value)").select("*", dbf.cos("value")).show()
Output
+-----+----------+
|value|COS(value)|
+-----+----------+
| NaN| NaN|
| NULL| NULL|
+-----+----------+