Version Control with Git

Install Git

Download the Git for Windows installer from https://git-scm.com/download/win.
Run the installer and follow the steps bellow:
1. Click on “Next”.
2. Click on “Next”.
3. Keep “Use Git from the Windows Command Prompt” selected and click on “Next”. If you forgot to do this, rerun the installer and select the appropriate option.
4. Click on “Next”.
5. Keep “Checkout Windows-style, commit Unix-style line endings” selected and click on “Next”.
6. Keep “Use Windows’ default console window” selected and click on “Next”.
7. Click on “Install”.
8. Click on “Finish”.
If your “HOME” environment variable is not set (or you don’t know what this is):
1. Open command prompt (Open Start Menu then type ‘cmd’ (without quotes) and press [Enter])
2. Type the following line into the command prompt window exactly as shown: setx HOME "%USERPROFILE%"
3. Press [Enter], you should see SUCCESS: Specified value was saved.
4. Quit command prompt by typing exit then pressing [Enter]

install `git’ from your distro’s package manager.

A quick overview of Version Control
Start off by registering a github account at https://github.com
Use your github user name and email to config git. Open a Shell/Command line window from RStudio menu Tools/Shell…, and modify and run the following commands:

git config --global user.name "Liming Wang"
git config --global user.email "lmwang+datascience@gmail.com"
git config --global color.ui "auto"

Let’s turn the RStudio project you have been working on into a git repository and commit it to GitHub by following these steps: http://happygitwithr.com/existing-github-last.html
Cache credentials
Collaborating
Conflicts
Review of common git commands

If you haven’t yet, commit your RStudio project to github;
Add the GitHub account of your team partner as a collaborator to your repo;
Exchange URL to your github repo with your team partner;
Checkout your team partner’s repo in RStudio (File/New Project …, then Verision Control);
Review his/her code and add comments for suggestions where the code can be improved;
Commit your change (comments) with a proper commit message;
Push your commit to GitHub;
After your partner pushes his/her commit, switch back to your own repo & pull to get the updated files with your partner’s comments;
Responded to the comments with your own comments or changes to your code, commit (with a commit message) and then push to GitHub;
Repeat the above steps a few times.