Chapter 1: R Home
1. What exactly is “R Home” / R_HOME? R_HOME is simply the folder (directory) where your R program itself is installed on your computer. It’s the root folder of the entire R installation. Everything...
Category: R
Chapter 2: R Introduction
1. What actually is R? (The short, honest version) R is a free, open-source programming language + software environment made especially for: Statistics Data analysis Data visualization (beautiful charts & graphs) Reporting results in...
Chapter 3: R Get Started
R Get Started” — this is the hands-on, step-by-step guide where we actually install everything, open it for the first time, run your very first lines, and make sure nothing goes wrong. I’m explaining...
Chapter 4: R Syntax
R: its syntax. Think of syntax as the grammar rules of the R language. If you break them, R gets confused and throws errors (those red messages in the console). But once you get...
Chapter 5: R Print Output
R Print Output means how to show results, messages, variables, tables, or anything on your screen (console in RStudio) so you (or others) can see what’s happening. R gives you several ways to do this...
Chapter 6: R Comments
1. What are Comments in R? (The Simple Truth) Comments are notes you write inside your code that the computer completely ignores. R never reads or executes them — they’re only for humans (you,...
Chapter 7: R Variables
R Variables. This is one of the very first things every beginner must really understand deeply, because almost everything else in R builds on variables. Imagine we’re sitting together with RStudio open on my...
Chapter 8: R Concatenate Elements
R Concatenate Elements” — one of the most frequently used (and sometimes confusing) operations in R. Concatenate simply means joining / sticking things together, usually strings (text), but also numbers or other elements, to...
Chapter 9: R Multiple Variables
R Multiple variables This topic can mean slightly different things depending on context, so I’ll cover both interpretations that beginners usually have in mind: Having / managing many different variables in a real script...
Chapter 10: R Variable Names
R Variable Names (also called object names or identifiers). Naming variables well is one of the most important skills in R — even more than knowing fancy functions. Bad names make code hard to...
