February 2017
Beginner to intermediate
1100 pages
25h 19m
English
book
Scala: Guide for Data Science Professionals
by Pascal Bugnion, Arun Manivannan, Patrick R. Nicolas
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Pipeline components
Pipelines consist of a set of components joined together such that the DataFrame produced by one component is used as input for the next component. The components available are split into two classes: transformers and estimators.
Transformers
Transformers transform one DataFrame into another, normally by appending one or more columns.
The first step in our spam classification algorithm is to split each message into an array of words. This is called
tokenization. We can use the Tokenizer transformer, provided by MLlib:
scala> import org.apache.spark.ml.feature._ import org.apache.spark.ml.feature._ scala> val tokenizer = new Tokenizer() tokenizer: org.apache.spark.ml.feature.Tokenizer = tok_75559f60e8cf
The behavior of transformers ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.