Introduction to R & RStudio

Week 1 - Lecture 4 & Lab 0

Hello R, This is Me!

Today…

In this lecture, we will…

learn what is R, RStudio and Quarto Document
create A STAT-218 Folder in Your Desktop
create A New Quarto Document
- save this document to your STAT-218 Folder
fill out the document
- have first coding experience by
  - saying Hello World!
  - creating an Object
  - running some functions
learn How to Get Help
render The First PDF

R and RStudio

Hadley Wickham and others at RStudio, CC BY-SA 4.0, via Wikimedia Commons

RStudio, Inc., Public domain, via Wikimedia Commons

R is a computer language.
R is an environment for statistical computing and graphics.
- R provides a wide variety of statistical and graphical techniques.
R is a free open source software

RStudio is an integrated development environment (IDE) for R
RStudio has four main panes each in a quadrant of your screen

What Can We Do with RStudio?

Everything we need to do for this class and beyond!

What is Quarto Document?

Quarto is…

an open-source scientific and technical publishing system
a multi-language, next-generation version of R Markdown.
enabling you to combine code and text to create rich outputs, like reports and presentations. (like an advanced version of a word processing tool)

Important

R is the programming language for statistical computing
RStudio is the IDE that facilitates R programming
Quarto document is a document type that combines text and code
In short, we will create Quarto documents in RStudio and we will combine text and R codes in that Quarto document to create our lab reports.

Today’s Tasks

Task 1: Create A Folder

Task 2: Creating a Quarto Document

Tip

You can create your own Quarto document by clicking File > New File > Quarto Document
Let’s try to create our first Quarto document!

Task 2: Creating a Quarto Document

Pane Layout in RStudio

How to Create a New Quarto Document

Panes in RStudio

A Closer Look into the Quarto Document

Task 3: Play with Your First Quarto Document

Delete The Default Content

Add Headings and Text

Add A Code Chunk

Add This Simple Code

Let’s Create An Object

We create an object by using “<-” called as “Object Assignment Operator”

	Windows	Mac
Shortcut	Alt and -	Option and -

my_birthyear <- 1988
my_birthyear

[1] 1988

Run the Code Chunk

Say, Hello World!

hello world is a phrase that most programmers use when they first begin programming in any language.
- Let’s write our first “hello world!” together.

:::

Vocabulary Section

do(something)

do() is a function;

something is the argument of the function.

do(something, colorful) # I can put here a comment by using hashtag

do() is a function;
something is the first argument of the function;
colorful is the second argument of the function.

R ignores comments if you put # like above

I love Dr. Dogucu’s teaching strategy to teach students the basics of coding. This is how she explains the idea of coding. I am using some of her strategies during this session.

Let’s try some functions!

wedding_year <- 2006
wedding_years <- c(2006, 2020, 1984)
wedding_years

[1] 2006 2020 1984

wedding_years <- c(wedding_year, 2020, 1984)
wedding_years

[1] 2006 2020 1984

Let’s try some functions!

names <- c("Me", "My Sister", "My Parents")
names

[1] "Me"         "My Sister"  "My Parents"

data.frame(name = names, wedding_year = wedding_years)

        name wedding_year
1         Me         2006
2  My Sister         2020
3 My Parents         1984

Check Your Document Before Rendering

Rendering a PDF Document

The Quarto document that we created is a source file.
By rendering this, will have a different output file (e.g., PDF)

Rendering a PDF Document

Open your terminal pane and type the following:

quarto install tinytex

Rendering a PDF Document

Lab Assignment 0

Please upload this PDF document to our Canvas page as LAB Assignment 1 (Individual)
Begining from tomorrow, we will start working in groups.