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Big Data Analysis with Python

Big Data Analysis with Python

By : Ivan Marin, Ankit Shukla, Sarang VK
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Big Data Analysis with Python

Big Data Analysis with Python

1 (1)
By: Ivan Marin, Ankit Shukla, Sarang VK

Overview of this book

Processing big data in real time is challenging due to scalability, information inconsistency, and fault tolerance. Big Data Analysis with Python teaches you how to use tools that can control this data avalanche for you. With this book, you'll learn practical techniques to aggregate data into useful dimensions for posterior analysis, extract statistical measurements, and transform datasets into features for other systems. The book begins with an introduction to data manipulation in Python using pandas. You'll then get familiar with statistical analysis and plotting techniques. With multiple hands-on activities in store, you'll be able to analyze data that is distributed on several computers by using Dask. As you progress, you'll study how to aggregate data for plots when the entire data cannot be accommodated in memory. You'll also explore Hadoop (HDFS and YARN), which will help you tackle larger datasets. The book also covers Spark and explains how it interacts with other tools. By the end of this book, you'll be able to bootstrap your own Python environment, process large files, and manipulate data to generate statistics, metrics, and graphs.
Table of Contents (11 chapters)
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Big Data Analysis with Python
Preface

Introduction


In the previous chapter, we learned the basic concepts of Spark DataFrames and saw how to leverage them for big data analysis.

In this chapter, we will go a step further and learn about handling missing values in data and correlation analysis with Spark DataFrames—concepts that will help us with data preparation for machine learning and exploratory data analysis.

We will briefly cover these concepts to provide the reader with some context, but our focus is on their implementation with Spark DataFrames. We will use the same Iris dataset that we used in the previous chapter for the exercises in this chapter as well. But the Iris dataset has no missing values, so we have randomly removed two entries from the Sepallength column and one entry from the Petallength column from the original dataset. So, now we have a dataset with missing values, and we will learn how to handle these missing values using PySpark.

We will also look at the correlation between the variables in the Iris dataset...

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