Welcome to doctoral course 2657, "Introduction to R - data management, analysis and graphical presentation". Below are video recordings covering the lectures for day 1 of the course (except for the introductory lecture about the history of R). The video clips are in the same order as the topics in your handouts, although some of the slides may not be presented in the films. The recorded material can be used to prepare yourself for the live lectures, for students who are unable to attend, or for repetition of difficult topics.
If you think we speak too slowly, the video settings lets you increase presentation speed by 25, 50 or even 100%. If you prefer to watch all clips as a continuous stream, they are available as a playlist here (1h 10 min).
A brief introduction to the native R user interface.
Although we use RGui in this course (for its simplicity and compatibility with small screens), many R users prefer RStudio or other user interfaces with additional features. Feel free to use them during the course, if you like.
To get a lot of practice, make it a habit to use R for all calculations - even the basic ones.
How to assign values to variables and use them in your calculations.
Vectors are an integral part of R and getting used to them is really a necessity.
Draw random samples from a user-defined set of values.
Draw random samples from specific distributions such as the normal or binomial distribution. Great tool for simulating studies at the design stage.
The workspace is a place in the computer's working memory where all your objects (data structures, functions etc.) are kept.
Very few (if any) know R by heart, and knowing where to find help will get you a long way.
R is a lot about nomenclature, and telling the various data structures (vectors, factors, arrays etc.) apart is necessary, although it may take some effort.
To make the R script understandable to others and your future self, put a lot of comments into it. Comments are ignored by R, but they are invaluable to human beings.
That's all for day 1, now it's time for the assignments. We need your solutions no later than 9 AM November 17.