3.1 Calculations3.2 Naming objects3.3 Factors3.4 Logical operations3.5 Generating sequences3.6 Class membership3.7 Missing values, infinity, and things that are not numbers3.8 Vectors and subscripts3.9 Working with logical subscripts3.10 Vector functions3.11 Matrices and arrays3.12 Random numbers, sampling, and shuffling3.13 Loops and repeats3.14 Lists3.15 Text, character strings, and pattern matching3.16 Dates and times in 3.17 Environments3.18 Writing functions3.19 Structure of objects3.20 Writing from to a file3.21 Tips for writing codeReferences