Teradata Package for Python Function Reference | 20.00 - pow - Teradata Package for Python - Look here for syntax, methods and examples for the functions included in the Teradata Package for Python.
Teradata® Package for Python Function Reference - 20.00
- Deployment
- VantageCloud
- VantageCore
- Edition
- Enterprise
- IntelliFlex
- VMware
- Product
- Teradata Package for Python
- Release Number
- 20.00.00.03
- Published
- December 2024
- Language
- English (United States)
- Last Update
- 2024-12-19
- dita:id
- TeradataPython_FxRef_Enterprise_2000
- Product Category
- Teradata Vantage
- teradataml.dataframe.sql.DataFrameColumn.pow = pow(expression)
- DESCRIPTION:
Function returns the value in the column raised to the power of the exponent value (expression).
ALTERNATE NAME:
power
PARAMETERS:
expression:
Required Argument.
Specifies a ColumnExpression of a numeric column or a constant value that is the exponent value.
Format for the argument: '<dataframe>.<dataframe_column>'.
Types: ColumnExpression, int
RAISES:
TypeError, ValueError, TeradataMlException
RETURNS:
DataFrameColumn
EXAMPLES:
# Load the data to execute the example.
>>> load_example_data("dataframe", "admissions_train")
>>>
# Create a DataFrame on 'admissions_train' table.
>>> df = DataFrame("admissions_train").iloc[:4]
>>> print(df)
masters gpa stats programming admitted
id
3 no 3.70 Novice Beginner 1
4 yes 3.50 Beginner Novice 1
2 yes 3.76 Beginner Beginner 0
1 yes 3.95 Beginner Beginner 0
# Example 1: Compute the power and pass it as input to DataFrame.assign().
>>> res = df.assign(col_2 = df.gpa.pow(2),
... col = df.gpa.pow(df.admitted))
>>> print(res)
masters gpa stats programming admitted col col_2
id
3 no 3.70 Novice Beginner 1 3.7 13.6900
4 yes 3.50 Beginner Novice 1 3.5 12.2500
2 yes 3.76 Beginner Beginner 0 1.0 14.1376
1 yes 3.95 Beginner Beginner 0 1.0 15.6025
Example 2: Executed pow() function on "admitted" column and filtered computed
# values which are equal to 1.0.
>>> print(df[df.gpa.pow(df.admitted) == 1.0])
masters gpa stats programming admitted
id
2 yes 3.76 Beginner Beginner 0
1 yes 3.95 Beginner Beginner 0