expm1

Calcule l'exponentielle de la valeur donnée moins un. Prend en charge Spark Connect.

Pour la fonction Databricks SQL correspondante, consultez la fonctionexpm1.

Syntaxe

Python

from pyspark.sql import functions as dbf

dbf.expm1(col=<col>)

parameter

parameter	Type	Description
col	pyspark.sql.Column or column name	colonne pour calculer l'exponentielle.

parameter	Type	Description
col	pyspark.sql.Column or column name	colonne pour calculer l'exponentielle.

Renvoie

pyspark.sql.Column: exponentiel moins un.

Exemples

Python

from pyspark.sql import functions as dbf
df = spark.sql("SELECT id AS value FROM RANGE(5)")
df.select("*", dbf.expm1(df.value)).show()

Output

+-----+------------------+
|value|      EXPM1(value)|
+-----+------------------+
|    0|               0.0|
|    1| 1.718281828459...|
|    2|  6.38905609893...|
|    3|19.085536923187...|
|    4|53.598150033144...|
+-----+------------------+

Python

from pyspark.sql import functions as dbf
spark.sql(
    "SELECT * FROM VALUES (FLOAT('NAN')), (NULL) AS TAB(value)"
).select("*", dbf.expm1("value")).show()

Output

+-----+------------+
|value|EXPM1(value)|
+-----+------------+
|  NaN|         NaN|
| NULL|        NULL|
+-----+------------+