In this lecture, I will show you how you can control the flow of the R program using choices and loops. Loops should be generally avoided in R since they can be slow. It is crucial to understand them because sometimes they can not be avoided.

In this lecture, I will explain to you how subsetting works, how you can replace (i.e., assign) parts of the object, remove parts, append objects, order, and filter. These operations are one of the most important ones in any analysis that you might perform later.