Once you have downloaded the repo to your local environment, the first thing that you want to do is to install all of the packages that this project will require. This way you will avoid errors when running the scripts.
install.packages(c("reshape", "MASS", "psych", "Rglpk", "XML", "data.table"), dependencies=TRUE)
Fantasy Football Analytics is a website for harnessing the power of statistics, data analysis, and R to improve your performance in fantasy football. This GitHub repository includes R scripts and data files for conducting the analyses in R as described on the website. Read more at http://fantasyfootballanalytics.net/.