Book Image

Simulation for Data Science with R

By : Matthias Templ
Book Image

Simulation for Data Science with R

By: Matthias Templ

Overview of this book

Data Science with R aims to teach you how to begin performing data science tasks by taking advantage of Rs powerful ecosystem of packages. R being the most widely used programming language when used with data science can be a powerful combination to solve complexities involved with varied data sets in the real world. The book will provide a computational and methodological framework for statistical simulation to the users. Through this book, you will get in grips with the software environment R. After getting to know the background of popular methods in the area of computational statistics, you will see some applications in R to better understand the methods as well as gaining experience of working with real-world data and real-world problems. This book helps uncover the large-scale patterns in complex systems where interdependencies and variation are critical. An effective simulation is driven by data generating processes that accurately reflect real physical populations. You will learn how to plan and structure a simulation project to aid in the decision-making process as well as the presentation of results. By the end of this book, you reader will get in touch with the software environment R. After getting background on popular methods in the area, you will see applications in R to better understand the methods as well as to gain experience when working on real-world data and real-world problems.
Table of Contents (18 chapters)
Simulation for Data Science with R
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Data manipulation in R


For students working with perfectly prepared data from various R packages on relatively small scale problems, data manipulation is not the big issue. However, in the daily practice of a data scientist, most of the time working on data analysis does not involve applying a suitable function to an already perfectly prepared piece of data. The majority of work is done on data manipulation, in order to collect data from several sources, shape the data into a suitable format, and extract the relevant information. Thus, data manipulation is the core work, and data scientists and statisticians should possess strong data manipulation skills.

Whenever you work with data frames, the package dplyr provides user-friendly and computationally efficient code. One package that supports even more efficient data manipulation is the data.table package (Dowle et al., 2015). However, since both packages have their advantages, we report both. Also, data.table works with two dimensional data...