Legal Analytics Course - Class #4 - Github and RMarkdown Tutorial - Professors Daniel Martin Katz + Michael J Bommarito

Legal Analytics
Professor Daniel Martin Katz
Professor Michael J Bommarito II
Class 4
Github + Markdown Overview
legalanalyticscourse.com

eventually we will work to apply
Machine Learning (ML)
to various problems in law
access more at legalanalyticscourse.com

but today we want to expand our
tactical understanding
of social coding (i.e. GitHub)

Signup for a Github Account

GitHubTutorial

Create a GitHub Account
h"ps://github.com/

Create a New Repository

Step1 name your repository
(try to avoid upper case letters & spaces)

Step3
Step4
Step2

Edit *.md (markdown) Files

More details about Markdown syntax:
h"ps://github.com/adam-‐p/markdown-‐here/wiki/Markdown-‐Cheatsheet
Edit the ﬁle following GitHub Markdown
syntax
(eg. #H1, ##H2, ###H3)

Add commit message here
• Commit message:
• Helps participants track
changes
• Keep it simple !

Add commit message here
• Commit message:
• Helps participants track
changes
• Keep it simple !
Put details here

Create *.md Files

Create *.md Files
Remember to end file name with “.md”
so GitHub knows it’s a markdown file
Follow the steps from slide 6 of this slide deck (editing *.md files)
for instructions on how to edit the document

Delete a Repository
Navigate to the repository you
want to delete and click “Settings”

Delete a Repository
In the Settings, scroll down to the “Danger Zone”

GitHub Client
The easiest way to use
GitHub on your computer!

GitHub Client Install for Mac
https://mac.github.com/
Download GitHub Client Installer from the website

Double click the downloaded .zip ﬁle
A GitHub Installer app is created

Do Not Move is recommended so you can move
it manually, but either way is ﬁne

Click continue and follow the instructions to install GitHub Client
(It’s ok if you don’t have a local repository, just click “done”)

GitHub Client Install for Windows
https://windows.github.com/
Download GitHub Client Installer from the website

The GitHub icon will show in your downloading folder
Double click the icon

Click Run and follow the instructions
(It’s ok if you don’t have a local repository,
click the blue "Dashboard" word link)

Cloning a Repository
Step1: Select the repository you want to keep in the computer
Step2: Select the local folder you want to save the repository
A new folder should appear on the location you just selected

Cloning a Repository
IMPORTANT: This folder is NOT your actual GitHub
repository. It is a clone of it. Anything you change on your
computer WILL NOT change in GitHub unless you commit
the changes (see descriptions in later slides). In other
words, deletions, additions, or changes on your computer
will not automatically sync to GitHub unless you commit
these changes manually. All modiﬁcations that you make
after a commit are recoverable if you change your mind
later (see Recovering Deleted Data from GitHub)

Add Files to a Repository
Drag the ﬁle to your repository
In GitHub Client, you can see the added ﬁle
under the “Change” tab (Mac)

• Windows users are able to see the
new “Uncommited changes” section
• Click the blue button next to show and
you can see the ﬁle you just added

• After editing summary and description,
click “Commit to master”
• Click “Sync”
The change from your computer will synchronize to
your
repository on GitHub.com

Recover Deleted Data
from GitHub
If a ﬁle has been deleted from your local folder, and
the repository on GitHub.com was updated without
the ﬁle, you can still recover your data!!
Click History section

Recover Deleted Data from
GitHub
• Select the commit that
you want to revert to
• In the right hand preview
panel, click the gear
symbol
• Select "Revert this
Commit"
Mac users
Windows users
• Select the commit that you want to revert to
• in the right hand preview panel, click the
"Revert" icon

GitHub
IMPORTANT: Revert and Rollback are DIFFERENT in
Github.
• Revert - Undo the action in the commit that you
specify
• Rollback - Delete all committed changes up to the
commit that you specify

GitHub
Don’t forget to click “Sync” in the upper right hand corner,
so your repository on GitHub.com can be updated!
Congratulations!!
Happy GitHubbing

Useful Links
• YouTube Tutorials:
• Windows:
https://www.youtube.com/watch?v=u12zHGRﬁKU
• OS X:
https://www.youtube.com/watch?v=f-Wy2bob2vQ
• GitHub Guide Tutorial:
https://guides.github.com/activities/hello-world/

Legal Analytics Course - Class #4 - Github and RMarkdown Tutorial - Professors Daniel Martin Katz + Michael J Bommarito

Using R Scripts
and
R Markdown

> getwd()
[1] "/Users/katzd/Basic"
> setwd("/Users/katzd/Desktop/LegalAnalyticsMaterials/CourseExamples/")
Open Up RStudio
and Always
SetYour Working Directory

Open a new
R Script
Make Sure the
File Path is in
Sync

Creating Scripts
will allow you to
preserve your
work product,
revisit it later +
run code in batch

RMarkdown allows you
create Html objects using
Knit HTML

created using a .rmd ﬁle

Legal Analytics Course - Class #4 - Github and RMarkdown Tutorial - Professors Daniel Martin Katz + Michael J Bommarito

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