October 2015
Beginner to intermediate
254 pages
5h 31m
English
Content preview from Scala Data Analysis Cookbook (new)Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Loading more than 22 features into classes
Case classes have an inherent limitation. They can hold only 22 attributes—Catch 22, if you will. While a reasonable percentage of datasets would fit in that budget, in many cases, the limitation of 22 features in a dataset is a huge turnoff. In this recipe, we'll take a sample
Student dataset (http://archive.ics.uci.edu/ml/datasets/Student+Performance), which has 33 features, and we'll see how we can work around this.
Note
The 22-field limit is resolved in Scala version 2.11. However, Spark 1.4 uses Scala 2.10.
How to do it...
Case classes in Scala cannot go beyond encapsulating 22 fields because the companion classes that are generated (during compilation) for these case classes cannot find the matching ...
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