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How to use the Series.transform() function in pandas
Maria ElijahOverview
The pandas Series.transform() function applies a function on itself and produces a Series of the transformed element with the same axis shape as itself.
Syntax
Series.transform(func, axis=0)
Parameters:
func: This represents the function or list of functions used to transform the series elements.axis: This represents the parameter needed forDataFramecompatibility. It can be0or index.
Code example
The following code will demonstrate how to use the Series.transform() function in pandas:
import pandas as pd # create Series my_series = pd.Series([17, 10, 28, 15, 23, 7, 9, 36, 14]) # apply lambda function to series element # using product() print(my_series.transform(lambda x: x **2 - 100)) print(len(my_series))
Code explanation
In the code above:
-
Line 1: We import the
pandaslibrary. -
Lines 4: We create Series called
my_seriesof length9. -
Line 8: We pass a
lambdafunction as an argument to thetransform(), which multiplies each element in theSeriesby the power of2and subtracts100from each.
RELATED TAGS
python3
pandas
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