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

Summary


The simulations shown in this chapter are of two different kinds: model-based simulation and design-based simulation. Model-based simulations simulate data from a certain (super-population) model. We saw that model-based simulations are easy to set-up. The aim is to always know true parameters – here, from the model that simulates random distributions of interest. The estimation is applied to each of the simulated data and compared with the true parameter values.

Design-based simulation studies differ in that sense that the sampling design must be incorporated. This is why we firstly showed how to simulate a finite population from where samples can be drawn. Whenever data sets are sampled with simple random sampling, there is no need for design-based simulations.

We also showed the efficient use of package simFrame. The examples showed that the framework allows researchers to make use of a wide range of simulation designs with only a few lines of code. In order to switch from one simulation...