Book Image

Apache Spark Machine Learning Blueprints

By : Alex Liu
Book Image

Apache Spark Machine Learning Blueprints

By: Alex Liu

Overview of this book

There's a reason why Apache Spark has become one of the most popular tools in Machine Learning – its ability to handle huge datasets at an impressive speed means you can be much more responsive to the data at your disposal. This book shows you Spark at its very best, demonstrating how to connect it with R and unlock maximum value not only from the tool but also from your data. Packed with a range of project "blueprints" that demonstrate some of the most interesting challenges that Spark can help you tackle, you'll find out how to use Spark notebooks and access, clean, and join different datasets before putting your knowledge into practice with some real-world projects, in which you will see how Spark Machine Learning can help you with everything from fraud detection to analyzing customer attrition. You'll also find out how to build a recommendation engine using Spark's parallel computing powers.
Table of Contents (18 chapters)
Apache Spark Machine Learning Blueprints
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Data cleaning


In this section, we will review some methods for data cleaning on Spark with a focus on data incompleteness. Then, we will discuss some of Spark's special features for data cleaning and also some data cleaning solutions made easy with Spark.

After this section, we will be able to clean data and make datasets ready for machine learning.

Dealing with data incompleteness

For machine learning, the more the data the better. However, as is often the case, the more the data, the dirtier it could be—that is, the more the work to clean the data.

There are many issues to deal with data quality control, which can be as simple as data entry errors or data duplications. In principal, the methods of treating them are similar—for example, utilizing data logic for discovery and subject matter knowledge and analytical logic to correct them. For this reason, in this section, we will focus on missing value treatment so as to illustrate our usage of Spark for this topic. Data cleaning covers data...