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You're reading from Hands-On Big Data Analytics with PySpark Analyze large datasets and discover techniques for testing, immunizing, and parallelizing Spark jobs

Product type Paperback

Published in Mar 2019

Publisher Packt

ISBN-13 9781838644130

Length 182 pages

Edition 1st Edition

Languages

Python

Tools

PySpark

Concepts

Big Data

Authors (3):

James Cross

Bartłomiej Potaczek

Rudy Lai

View More author details

Table of Contents (15) Chapters

Preface

1. Installing Pyspark and Setting up Your Development Environment FREE CHAPTER

2. Getting Your Big Data into the Spark Environment Using RDDs

3. Big Data Cleaning and Wrangling with Spark Notebooks

4. Aggregating and Summarizing Data into Useful Reports

5. Powerful Exploratory Data Analysis with MLlib

6. Putting Structure on Your Big Data with SparkSQL

7. Transformations and Actions

8. Immutable Design

9. Avoiding Shuffle and Reducing Operational Expenses

10. Saving Data in the Correct Format

11. Working with the Spark Key/Value API

12. Testing Apache Spark Jobs

13. Leveraging the Spark GraphX API

14. Other Books You May Enjoy

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Aggregating and Summarizing Data into Useful Reports

In this chapter, we will learn how to aggregate and summarize data into useful reports. We will learn how to calculate averages with map and reduce functions, perform faster average computation, and use pivot tables with key-value pair data points.

In this chapter, we will cover the following topics:

Calculating averages with map and reduce
Faster average computations with aggregate
Pivot tabling with key-value paired data points

The rest of the chapter is locked

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Authors (2)

Rudy Lai

Colibri Digital is a technology consultancy company founded in 2015 by James Cross and Ingrid Funie. The company works to help its clients navigate the rapidly changing and complex world of emerging technologies, with deep expertise in areas such as big data, data science, machine learning, and Cloud computing. Over the past few years, they have worked with some of the World's largest and most prestigious companies, including a tier 1 investment bank, a leading management consultancy group, and one of the World's most popular soft drinks companies, helping each of them to better make sense of its data, and process it in more intelligent ways.The company lives by its motto: Data -> Intelligence -> Action. Rudy Lai is the founder of QuantCopy, a sales acceleration startup using AI to write sales emails for prospects. By taking in leads from your pipelines, QuantCopy researches them online and generates sales emails from that data. It also has a suite of email automation tools to schedule, send, and track email performancekey analytics that all feed back into how our AI generates content. Prior to founding QuantCopy, Rudy ran HighDimension.IO, a machine learning consultancy, where he experienced first-hand the frustrations of outbound sales and prospecting. As a founding partner, he helped startups and enterprises with HighDimension.IO's Machine-Learning-as-a-Service, allowing them to scale up data expertise in the blink of an eye. In the first part of his career, Rudy spent 5+ years in quantitative trading at leading investment banks such as Morgan Stanley. This valuable experience allowed him to witness the power of data, but also the pitfalls of automation using data science and machine learning. Quantitative trading was also a great platform from which you can learn about reinforcement learning and supervised learning topics in depth and in a commercial setting. Rudy holds a Computer Science degree from Imperial College London, where he was part of the Dean's List, and received awards such as the Deutsche Bank Artificial Intelligence prize.

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Bartłomiej Potaczek

Bartłomiej Potaczek is a software engineer working for Schibsted Tech Polska and programming mostly in JavaScript. He is a big fan of everything related to the react world, functional programming, and data visualization. He founded and created InitLearn, a portal that allows users to learn to program in a pair-programming fashion. He was also involved in InitLearn frontend, which is built on the React-Redux technologies. Besides programming, he enjoys football and crossfit. Currently, he is working on rewriting the frontend for tv.nu—Sweden's most complete TV guide, with over 200 channels. He has also recently worked on technologies including React, React Router, and Redux.

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