Book Image

R Statistics Cookbook

By : Francisco Juretig
2 (2)
Book Image

R Statistics Cookbook

2 (2)
By: Francisco Juretig

Overview of this book

R is a popular programming language for developing statistical software. This book will be a useful guide to solving common and not-so-common challenges in statistics. With this book, you'll be equipped to confidently perform essential statistical procedures across your organization with the help of cutting-edge statistical tools. You'll start by implementing data modeling, data analysis, and machine learning to solve real-world problems. You'll then understand how to work with nonparametric methods, mixed effects models, and hidden Markov models. This book contains recipes that will guide you in performing univariate and multivariate hypothesis tests, several regression techniques, and using robust techniques to minimize the impact of outliers in data.You'll also learn how to use the caret package for performing machine learning in R. Furthermore, this book will help you understand how to interpret charts and plots to get insights for better decision making. By the end of this book, you will be able to apply your skills to statistical computations using R 3.5. You will also become well-versed with a wide array of statistical techniques in R that are extensively used in the data science industry.
Table of Contents (12 chapters)

Spectral decomposition of time series

Time series can be decomposed as the sum of several components, each one of them having a different frequency. Using this approach, we can see which are the frequencies that dominate: for example, there might be a yearly component and a weekly component.

This spectral decomposition is useful for understanding cycles, and the dynamics of a time series. It can also be used as a preliminary tool for studying seasonality in detail. This knowledge can then be used to choose the right seasonality structure for removal from the series.

Getting ready

In order to run this recipe, the timesboot package needs to be installed using install.packages().

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