Our goal is to cover some very fundamental concepts underlying how data is represented and manipulated in R.
Lecture 04 will be carried out directly in RStudio Cloud.
This suites the material and also gives me a chance to show you some tricks with RStudio.
The code and data I use today in in the \({\tt examples}\) and \({\tt data}\) folders in RStudio project L04.
We don’t cover all the basics of programming here. Just a few key concepts.
Action Items
Solve the swap problem discussed in the lecture.
Points of Reflection
Why do you think the notion of data has a specific class is important?
You have operators\((+, -, *, /)\) and operands, the objects that the operators are applied to; eg in the equation \(x + y\), \(x\) and \(y\) are operands.
Does every operator work on every class of data?
Notice that we used the \(+\) operator when building the layers of the \({\tt ggplot}\) objects.
What are the operands here and what class do they have?
