Type the following in your R terminal
devtools::install_github("https://github.com/arthurzaneti/chen")
If you get the following message :
Error in loadNamespace(x) : there is no package called ‘devtools’
Try dowloading devtools and then dowloading from github, you can copy and paste the following in your R terminal, or Rstudio script:
install.packages("devtools")
devtools::install_github("arthurzaneti/chen")