Data Manipulation with R

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Data Manipulation with R by Jaynal Abedin

2014 | ISBN: 178328109X | English | 102 pages | PDF | 7 MB


Perform group-wise data manipulation and deal with large datasets using R efficiently and effectively

Overview

Perform factor manipulation and string processing
Learn group-wise data manipulation using plyr
Handle large datasets, interact with database software, and manipulate data using sqldf
In Detail

One of the most important aspects of computing with data is the ability to manipulate it to enable subsequent analysis and visualization. R offers a wide range of tools for this purpose. Data from any source, be it flat files or databases, can be loaded into R and this will allow you to manipulate data format into structures that support reproducible and convenient data analysis.

This practical, example-oriented guide aims to discuss the split-apply-combine strategy in data manipulation, which is a faster data manipulation approach. After reading this book, you will not only be able to efficiently manage and check the validity of your datasets with the split-apply-combine strategy, but you will also learn to handle larger datasets.

This book starts with describing the R object's mode and class, and then highlights different R data types, explaining their basic operations. You will focus on group-wise data manipulation with the split-apply-combine strategy, supported by specific examples. You will also learn to efficiently handle date, string, and factor variables along with different layouts of datasets using the reshape2 package. You will learn to use plyr effectively for data manipulation, truncating and rounding data, simulating data sets, as well as character manipulation. Finally you will get acquainted with using R with SQL databases.

What you will learn from this book

Learn R data types and their basic operations
Deal efficiently with string, factor, and date
Understand group-wise data manipulation
Work with different layouts of the R dataset and interchange between layouts for different purposes
Connect R with database software to manage relational databases
Manage bigger datasets using R
Manipulate datasets using SQL statements through the sqldf package
Approach

This book is a step-by step, example-oriented tutorial that will show both intermediate and advanced users how data manipulation is facilitated smoothly using R.

Who this book is written for

This book is aimed at intermediate to advanced level users of R who want to perform data manipulation with R, and those who want to clean and aggregate data effectively. Readers are expected to have at least an introductory knowledge of R and some basic administration work in R, such as installing packages and calling them when required.

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