Book Image

Data Analysis with R, Second Edition - Second Edition

Book Image

Data Analysis with R, Second Edition - Second Edition

Overview of this book

Frequently the tool of choice for academics, R has spread deep into the private sector and can be found in the production pipelines at some of the most advanced and successful enterprises. The power and domain-specificity of R allows the user to express complex analytics easily, quickly, and succinctly. Starting with the basics of R and statistical reasoning, this book dives into advanced predictive analytics, showing how to apply those techniques to real-world data though with real-world examples. Packed with engaging problems and exercises, this book begins with a review of R and its syntax with packages like Rcpp, ggplot2, and dplyr. From there, get to grips with the fundamentals of applied statistics and build on this knowledge to perform sophisticated and powerful analytics. Solve the difficulties relating to performing data analysis in practice and find solutions to working with messy data, large data, communicating results, and facilitating reproducibility. This book is engineered to be an invaluable resource through many stages of anyone’s career as a data analyst.
Table of Contents (24 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Exercises


Practice the following exercises to revise the concepts learned so far:

  • Is multiple imputation amenable to parallel computation? Why, or why not?
  • How is the way we call to.radians wasteful? Is there any way to refactor our code to use to.radians in a more efficient way?
  • When I was gathering the data from Figure 12.2, I didn't check every sample size from 1 to the full data set; yet, I've obtained a smooth curve. What I did was test the performance of a handful of sample sizes from 100 to only 2,000. Then I used nls (non-linear least squares) to fit an equation of the form
    (where n is the sample size) to the data points, and extrapolated with this equation after solving for x. What are some benefits and drawbacks of this approach? Do this on your own machine, if applicable. Do your performance curves match mine?
  • There is a thought among some scholars that there is an incongruence between Adam Smith's two seminal works, The Wealth of Nations and The Theory of Moral Sentiments, namely...