Welcome back! R is one of my favorite programming languages out there, so let’s go over one of my favorite cheat sheets for this language. First off, my first job I ever had required experience with R, I used R once before in a summer class and literally passed the interview by studying this exact cheat sheet in the interview waiting room. I wouldn’t recommend only studying this cheat sheet but it’s a great way to verify that you understand the core concepts of this programming language.
The Cheat Sheet
With all of that hyping up let’s go ahead and view the cheat sheet, here’s a link to it:
Now obviously you probably won’t be able to pass an interview just from studying this sheet alone but you can get a good grasp on this language. This cheat sheet is brought to you by Rstudio’s website, like I mentioned, this was a huge help for me during my initial interview.
Now there’s a lot on this page so let’s go into a few details. Starting off, one of the most important things you need to do within R is installing packages, luckily for us this cheat sheet shows us how to do this:
Installing packages is a very important function, you will also need to learn the top packages to install for your projects. On top of this it shows us the basics of creating sample data frame and creating loops:
Creating loops and data frames are essentially the core of R, being able to process large amounts of data uses these types of functions. On top of this, assigning variables is another very important part of this language.
Another very important thing is reading in data, this includes Excel and CSV files. In order to do this in R we will use the following functions:
Those are essentially the core functions that I remembered for my interview, again, studying a cheat sheet isn’t going to get you the job, you’re going to have to actually study the language but you can use a cheat sheet to verify your knowledge. What I would highly recommend doing is taking any beginner tutorials for R then immediately create a project, project based learning is one of my favorite ways to learn a new programming language.
if you have any suggestions, thoughts or just want to connect, feel free to contact / follow me on Twitter! Also, below is a link to some of my favorite resources for learning programming, Python, R, Data Science, etc.
Here are some of my favorite courses, books and so much more. Most of these are affiliate links which help me create…
Thanks so much for reading!