Essentials of the R Language
There is an enormous range of things that R can do, and one of the hardest parts of learning R is finding your way around. Likewise, there is no obvious order in which different people will want to learn the different components of the R language. I suggest that you quickly scan down the following bullet points, which represent the order in which I have chosen to present the introductory material, and if you are relatively experienced in statistical computing, you might want to skip directly to the relevant section. I strongly recommend that beginners work thorough the material in the order presented, because successive sections build upon knowledge gained from previous sections. This chapter is divided into the following sections:
Other essential material is elsewhere: beginners will want to master data input (Chapter 3), dataframes (Chapter 4) and graphics (Chapter 5).
The screen prompt > is an invitation to put R to work. The convention in this book is that material that you need to type into the command line after the screen prompt is shown ...