There are 2 repositories under r-for-data-science topic.
The Exercise solution of the 1st chapter (Data Visualization with ggplot2) of Hadley Wickham's book "R for Data Science"
Portfolio of my data visualisation skills You can check out my all documents for various data visualisation plots. You will find various kind of plots from histograms to bubble plots to waffle plot to various graohs. I encourage you to look into the files
Documentation of lessons learnt from the book R for Data Science by Hadley Wickham and Garret Grolemund here http://r4ds.had.co.nz/
A review of supervised classification techniques in R categorizing short text news headlines
Solutions to selected exercises from Hadley Wickham and Garrett Grolemund's recent book