Welcome to Data Science 🙌

# Welcome to Data Science 🙌
### Dr. Çetinkaya-Rundel

---

layout: true
 
<div class="my-footer">

Dr. Mine Çetinkaya-Rundel -
<a href="http://www2.stat.duke.edu/courses/Fall18/sta112.01/schedule" target="_blank">stat.duke.edu/courses/Fall18/sta112.01
</a>

</div>

---

# Hello world!

---

## What is data science?

- + = data science?
--

- + = data science?
--

- + + = data science?
--

- + + = data science?
--

Data science is an exciting discipline that allows you to turn raw data into understanding, insight, and knowledge. We're going to learn to do this in a `tidy` way -- more on that later!

---

# What is this course?

This is a course on introduction to data science, with an emphasis on statistical thinking.

**Q - What data science background does this course assume?**  
A - None.

**Q - Is this an intro stat course?**  
A - While statistics `\(\ne\)` data science, they are very closely related and have tremendous of overlap. Hence, this course is a great way to get started with statistics. However this course is **not** your typical high school statistics course.

**Q - Will we be doing computing?**   
A - Yes.

---

# What is this course?

**Q - Is this an intro CS course?**  
A - No, but many themes are shared.

**Q - What computing language will we learn?**  
A - R.

**Q: Why not language X?**  
A: We can discuss that over ☕.

---

## Where is this course?

---

# Data in the wild

---

# Data from wearables

**A year as told by fitbit**

http://livefreeordichotomize.com/2017/12/27/a-year-as-told-by-fitbit/
]
.pull-right[
![A year as told by fitbit](img/nick-strayer-fitbit.png)
]
---

# R-Ladies chapters

**R-Ladies global tour**

http://www.masalmon.eu/2017/10/06/globalrladiestour/
]
.pull-right[
![R Ladies Global Tour](img/maelle-salmon-rladies.png)
]

---

# Trump's tweets

**Text analysis of Trump's tweets confirms he writes only the (angrier) Android half**

http://varianceexplained.org/r/trump-tweets/
]
.pull-right[
![Trump tweets](img/david-robinson-trump-tweets.png)
]

---

## Greatest Twitter scheme of all time

---

# Your turn!

---

## Create a GitHub account

.instructions[
Go to [github.com](https://github.com/), and create an account (unless you already have one). 
]

Tips for selecting a username:✦

.midi[
- Incorporate your actual name.
- Reuse username from other contexts, e.g., Twitter or Slack.
- Pick a username you'll be comfortable revealing to your future boss.
- Shorter is better than longer.
- Be as unique as possible in as few characters as possible.
- Make it timeless. Don’t highlight your current university, employer, etc.
- Avoid words laden with special meaning in programming, like `NA`.
]

.instructions[
Once done, place a green sticky on your laptop. If you have questions, place a pink sticky.
]

.footnote[ 
✦ Source: [Happy git with R](http://happygitwithr.com/github-acct.html#username-advice) by Jenny Bryan
]

---

## Join RStudio Cloud

.instructions[
Go to [http://bit.ly/sta112-rscloud-join](http://bit.ly/sta112-rscloud-join), and log in with your GitHub credentials.
]

.instructions[
Once done, place a green sticky on your laptop. If you have questions, place a pink sticky.
]

---

## Create your first data visualization

- Once you log on to RStudio Cloud, click on this course's workspace "STA 112FS - Fall 2018".
- Make a copy of the project called UN Votes, and launch it.
- In the Files pane in the bottom right corner, spot the file called `unvotes.Rmd`. Open it, and then click on the "Knit" button.
- Go back to the file and change your name on top (in the `yaml` -- we'll talk about what this means later) and knit again.
- Then change the country names to those you're interested in. Your spelling and capitalization should match how the countries appear in the data, so take a peek at the Appendix to see how the country names are spelled. Knit again. And voila, your first data visualization!

.instructions[
Once done, place a green sticky on your laptop. If you have questions, place a pink sticky.
]

---

## Join Slack

- Go to http://bit.ly/sta112-slack-join and join course Slack.
- Download the Slack app and keep it open.