Aggregate tables
Featured in 4 main posts
Summarize data tables by grouping rows together.
Apply a function over a vector or list
Featured in 3 main posts
Apply a function to a vector or list iteratively, one element at a time.
Column operations
Featured in 5 main posts
Select columns for display, perform calculations and create new columns on data tables.
Cross-join
Featured in 3 main posts
Create a data table with all possible arrangements of given sets of values.
Data tables
Featured in 3 main posts
Create, import and view data tables in R.
Functions
Featured in 5 main posts
Reuse code to perform the same operation on different inputs.
Lists
Featured in 2 main posts
Bundle together elements of any type.
Logical expressions
Featured in 4 main posts
Test whether simple or complex statements are true or false.
Random samples
Featured in 3 main posts
Draw random samples from a finite set.
Row operations
Featured in 5 main posts
Filter or sort the rows of a data table.
Sequences
Featured in 5 main posts
Create numeric sequences with set starting point, ending point, and increment.
Variables
Featured in 5 main posts
Assign values or objects to names.
Vectors
Featured in 6 main posts
- The birthday problem — Part 3: Calculating in steps
- The birthday problem — Part 2: The statistical shortcut
- How to get data from websites (fast)
- Football goals and coin flips: discovering the law of rare events
- The birthday problem — Part 1: When counting fails
- Drawing random biscuits: from probability to data
Bundle together and perform operations on values of the same type.
Wide/long table format
Featured in 1 main post
Rearrange data tables into wide or long structure.
This section explains certain programming and syntax concepts in the R language. To get started with R, follow this quick guide.
This section is meant as support to the main posts, not as an exhaustive stand-alone guide. Please refer to R’s documentation for more extensive information.