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From Brammert Ottens <>
Subject Standard scaler on multiple columsn without a vector
Date Thu, 26 Apr 2018 08:05:08 GMT

we are heavy users of spark, but only for data munging, not for training
our models. Now we are planing to use MLLib transformers for our offline
transformations, and want to have something that can easily do the same
transformations online.

We currently have the following plan:

- build online transformations, and an online pipeline, that can perform
our online transformations
- allow MLLib pipelines to be transformed to these optimized online
- because we are not using MLLib models, we want to adjust some of the
transformations to not need a vectors as input (like the standard scaler),
but a list of columns to transform.
- to reduce discrepency between the online and the offline world, have the
same code for online and offline transformations (so not the fitting)

Are there any plans in the pipeline already to attacked any of the above
ideas? And if not, would there be any interest in having this added to


Brammert Ottens
Data Scientist Customer Service Holding B.V.
Herengracht 597 Amsterdam 1017 CE Netherlands
Direct +31207094515
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