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Hands-On Automated Machine Learning
book

Hands-On Automated Machine Learning

by Sibanjan Das, Umit Mert Cakmak
April 2018
Beginner to intermediate content levelBeginner to intermediate
282 pages
6h 52m
English
Packt Publishing
Content preview from Hands-On Automated Machine Learning

FunctionTransformer

A FunctionTransformer is used to define a user-defined function that consumes the data from the pipeline and returns the result of this function to the next stage of the pipeline. This is used for stateless transformations, such as taking the square or log of numbers, defining custom scaling functions, and so on.

In the following example, we will build a pipeline using the CustomLog function and the predefined preprocessing method StandardScaler:

  1. We import all the required libraries as we did in our previous examples. The only addition here is the FunctionTransformer method from the sklearn.preprocessing library. This method is used to execute a custom transformer function and stitch it together to other stages in a pipeline: ...
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Publisher Resources

ISBN: 9781788629898Supplemental Content