Book Image

Hands-On Data Analysis with Scala

By : Rajesh Gupta
Book Image

Hands-On Data Analysis with Scala

By: Rajesh Gupta

Overview of this book

Efficient business decisions with an accurate sense of business data helps in delivering better performance across products and services. This book helps you to leverage the popular Scala libraries and tools for performing core data analysis tasks with ease. The book begins with a quick overview of the building blocks of a standard data analysis process. You will learn to perform basic tasks like Extraction, Staging, Validation, Cleaning, and Shaping of datasets. You will later deep dive into the data exploration and visualization areas of the data analysis life cycle. You will make use of popular Scala libraries like Saddle, Breeze, Vegas, and PredictionIO for processing your datasets. You will learn statistical methods for deriving meaningful insights from data. You will also learn to create applications for Apache Spark 2.x on complex data analysis, in real-time. You will discover traditional machine learning techniques for doing data analysis. Furthermore, you will also be introduced to neural networks and deep learning from a data analysis standpoint. By the end of this book, you will be capable of handling large sets of structured and unstructured data, perform exploratory analysis, and building efficient Scala applications for discovering and delivering insights
Table of Contents (14 chapters)
Free Chapter
Section 1: Scala and Data Analysis Life Cycle
Section 2: Advanced Data Analysis and Machine Learning
Section 3: Real-Time Data Analysis and Scalability


Data enrichment is the act of adding more information to raw data. Some examples of the enrichments are as follows:

  • Adding missing values
  • Adding lookup values
  • Joining with other datasets
  • Filtering
  • Aggregating

Continuing on the same example of using Person, let's say that the state element is optional. Given the zip information, we should be able to derive the value of state. In this specific case, we are performing the following two enrichments:

  • Looking up or deriving the value of state based on the zip value
  • Adding missing state value

Let's define a simple Scala function to map a US zip code to state. Please refer to Wikipedia ( for more info on US ZIP codes:

  1. Define a Scala case class called Person with a method called cleanCopy to provide a clean copy of the object:
scala> case class Person...