Useful

Topic Areas

Data Flair - The tutorials are grouped by skill level (beginner, intermediate, expert).
Intro to R course by Fabio Votta - part 1 - A fun introduction to R programming grouped into categories (operators, objects, functions, exercises, and data frames).
Intro to R course by Fabio Votta - part 2 - A fun introduction to R programming grouped into categories (data manipulation and cleaning featuring the janitor, tidyr, and dplyr packages).
Introduction to Data Analysis with R - This is a lecture series with videos, scripts and exercises introducing R and the tidyverse as well as statistical concepts.
R CODER - The tutorials are grouped into categories (introduction, data structures, data wrangling, programming, import & export, graphics) that cover in-depth all the basic needs for someone starting learning the R programming language.
Tutorials Point - The tutorials are grouped into categories (R tutorial, R Data Interfaces, R Charts & Graphs, R Statistics Examples, R Useful Resources) that cover in-depth all the basic needs for someone starting learning the R programming language.

stat.berkeley - Introduction to Functions - An introduction to functions in the R language by the organizers of Integrating Computing into the Statistics Curricula (U.C. Berkeley).

12 Months of aRt - In 2019, William Chase began a project to make a new series of artwork every month made entirely with R. In this project, he explored different techniques, developed algorithms, and provided detailed posts detailing the development process for each month.

Joining Data in R with dplyr - Course notes from the Joining Data in R with dplyr course on DataCamp. Topics include mutating joins, filtering joins and set operations, assembling data, advanced joining. Author: William Surles.

Descriptive Statistics - A tutorial of descriptive statistics which are used to summarize data in a way that provides insight into the information contained in the data. Author: Salvatore S. Mangiafico.