Faqs on plotting in R
https://www.datacamp.com/community/tutorials/15-questions-about-r-plots#gs.inYduc4
2. Basic R plotting with examples
https://www.harding.edu/fmccown/r/
3. GGPLOT cheatsheet
https://www.rstudio.com/wp-content/uploads/2015/03/ggplot2-cheatsheet.pdf
4. Cumulative Frequency chart
http://blog.amitsharma.in/2015/09/13/cumulative-distribution-plots-for-frequency-data-in-r/
5. Data Mining Tentative Lecture Notes
https://grid.cs.gsu.edu/~cscyqz/courses/dm/dmlectures.html