Book Image

Machine Learning with R Cookbook, Second Edition - Second Edition

By : Yu-Wei, Chiu (David Chiu)
Book Image

Machine Learning with R Cookbook, Second Edition - Second Edition

By: Yu-Wei, Chiu (David Chiu)

Overview of this book

Big data has become a popular buzzword across many industries. An increasing number of people have been exposed to the term and are looking at how to leverage big data in their own businesses, to improve sales and profitability. However, collecting, aggregating, and visualizing data is just one part of the equation. Being able to extract useful information from data is another task, and a much more challenging one. Machine Learning with R Cookbook, Second Edition uses a practical approach to teach you how to perform machine learning with R. Each chapter is divided into several simple recipes. Through the step-by-step instructions provided in each recipe, you will be able to construct a predictive model by using a variety of machine learning packages. In this book, you will first learn to set up the R environment and use simple R commands to explore data. The next topic covers how to perform statistical analysis with machine learning analysis and assess created models, covered in detail later on in the book. You'll also learn how to integrate R and Hadoop to create a big data analysis platform. The detailed illustrations provide all the information required to start applying machine learning to individual projects. With Machine Learning with R Cookbook, machine learning has never been easier.
Table of Contents (21 chapters)
Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Installing rhdfs


The rhdfs package is the interface between R and HDFS, which allows users to access HDFS from an R console. Similar to rmr2, one should install rhdfs on every task node, so that one can access HDFS resources through R. In this recipe, we will look at how to install rhdfs on the Cloudera QuickStart VM.

Getting ready

Ensure that you have completed the previous recipe by starting the Cloudera QuickStart VM and connecting the VM to the internet, so that you can proceed with downloading and installing the rhdfs package.

How to do it...

Perform the following steps to install rhdfs:

  1. First, you can download rhdfs 1.0.8 from GitHub. You may need to update the link if Revolution Analytics upgrades the version of rhdfs:
$wget --no-check-certificate
        https://raw.github.com/RevolutionAnalytics/rhdfs/master/
        build/rhdfs_1.0.8.tar.gz
  1. Next, you can install rhdfs under the command-line mode:
$ sudo HADOOP_CMD=/usr/bin/hadoop  R CMD INSTALL
        rhdfs_1.0.8.tar.gz
  1. You can then set...