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商品描述
This handy reference book detailing the intricacies of R covers version 4.x features, including numerous and significant changes to syntax, strings, reference counting, grid units, and more.
Starting with the basic structure of R, the book takes you on a journey through the terminology used in R and the syntax required to make R work. You will find looking up the correct form for an expression quick and easy. Some of the new material includes information on RStudio, S4 syntax, working with character strings, and an example using the Twitter API.
With a copy of the R 4 Quick Syntax Reference in hand, you will find that you are able to use the multitude of functions available in R and are even able to write your own functions to explore and analyze data.
What You Will Learn
- Discover the modes and classes of R objects and how to use them
- Use both packaged and user-created functions in R
- Import/export data and create new data objects in R
- Create descriptive functions and manipulate objects in R
- Take advantage of flow control and conditional statements
- Work with packages such as base, stats, and graphics
Who This Book Is For
Those with programming experience, either new to R, or those with at least some exposure to R but who are new to the latest version.
作者簡介
Margot Tollefson is a self-employed consulting statistician residing in the tiny town of Stratford in the corn and soybean fields of north-central Iowa. She started using the S-Plus language in the early 1990s and was happy to switch to R about ten years ago. Margot enjoys writing her own functions in R - to do plots and simulations, as well as to implement custom modeling and use published statistical methods. She earned her graduate degrees in statistics from Iowa State University in Ames, Iowa.
目錄大綱
Part 1: R Basics1. Downloading R and Setting Up a File System2. The R Prompt3. Assignments and Operators
Part 2: Kinds of Objects4. Modes of Objects5. Classes of Objects
Part 3: Functions6. Packaged Functions7. User Created Functions8. How to Use a Function
Part 4: I/O and Manipulating Objects9. Importing/Creating Data10. Exporting from R11. Descriptive Functions and Manipulating Objects
Part 5: Flow control12. Flow Control13. Examples of Flow Control14. The Functions ifelse() and switch()
Part 6: Some Common Functions, Packages and Techniques15. Some Common Functions16. The Packages base, stats and graphics17. The Tricks of the Trade
