How to download and setup R
Open terminal and run command
                                            git clone https://github.com/Twitter-Sentiment-Analysis/R.git
                                        
                                        git clone is used to create a copy or clone of R repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with R https://github.com/Twitter-Sentiment-Analysis/R/archive/master.zip
Or simply clone R with SSH
                                            [email protected]:Twitter-Sentiment-Analysis/R.git                                    
                                    If you have some problems with R
You may open issue on R support forum (system) here: https://github.com/Twitter-Sentiment-Analysis/R/issuesSimilar to R repositories
Here you may see R alternatives and analogs
echarts graal adv-r viz plotly.js vega visx plotly.py vprof flask_jsondash planetary.js markvis resonance android-dev-sources osmnx libRmath.js rrssb hybridauth login-with SocialCount sharer.js svgo LightGBM prophet mal h2o-3 ggplot2 awesome-R catboost shiny