Book Image

Scala and Spark for Big Data Analytics

By : Md. Rezaul Karim, Sridhar Alla
Book Image

Scala and Spark for Big Data Analytics

By: Md. Rezaul Karim, Sridhar Alla

Overview of this book

Scala has been observing wide adoption over the past few years, especially in the field of data science and analytics. Spark, built on Scala, has gained a lot of recognition and is being used widely in productions. Thus, if you want to leverage the power of Scala and Spark to make sense of big data, this book is for you. The first part introduces you to Scala, helping you understand the object-oriented and functional programming concepts needed for Spark application development. It then moves on to Spark to cover the basic abstractions using RDD and DataFrame. This will help you develop scalable and fault-tolerant streaming applications by analyzing structured and unstructured data using SparkSQL, GraphX, and Spark structured streaming. Finally, the book moves on to some advanced topics, such as monitoring, configuration, debugging, testing, and deployment. You will also learn how to develop Spark applications using SparkR and PySpark APIs, interactive data analytics using Zeppelin, and in-memory data processing with Alluxio. By the end of this book, you will have a thorough understanding of Spark, and you will be able to perform full-stack data analytics with a feel that no amount of data is too big.
Table of Contents (19 chapters)

Implementing text classification

Text classification is one of the most widely used paradigms in the field of machine learning and is useful in use cases such as spam detection and email classification and just like any other machine learning algorithm, the workflow is built of Transformers and algorithms. In the field of text processing, preprocessing steps such as stop-word removal, stemming, tokenizing, n-gram extraction, TF-IDF feature weighting come into play. Once the desired processing is complete, the models are trained to classify the documents into two or more classes.

Binary classification is the classification of inputting two output classes such as spam/not spam and a given credit card transaction is fraudulent or not. Multiclass classification can generate multiple output classes such as hot, cold, freezing, and rainy. There is another technique called Multilabel...