R-NA 😂

# R-NA <br> 😂

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# Welcome!

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## These slides are made with R

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<img src="img/marda.jpeg" width="80%" style="display: block; margin: auto;" />
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__Mardakhlan__
- Backbone of these slides was made by Mine Çetinkaya-Rundel
- She is an amazing data Scientist & Professional Educator, RStudio

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## Logistics

- Everything in one place: [https://bit.ly/3i3zzX0](https://bit.ly/3i3zzX0)
- RStudio Cloud: [https://rstudio.cloud/spaces/86874/project/1593858](https://rstudio.cloud/spaces/86874/project/1593858)
- Asking for help: Type in chat and feel free to interrupt

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## What we will cover today?

- R set up & hands on example of data wrangling problem

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# Software

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# Data science life cycle

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## RStudio

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# Let's dive in!

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<code class="countdown-time"><span class="countdown-digits minutes">10</span><span class="countdown-digits colon">:</span><span class="countdown-digits seconds">00</span></code>
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## R Markdown

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## How will we use R Markdown?

- You'll always have a template R Markdown document to start with

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## tidyverse

All packages share an underlying design philosophy, grammar, and data structures.
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<img src="img/tidyverse-packages.png" width="100%" style="display: block; margin: auto;" />
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## R

- R can be used as a calculator.

```r
8738787213 / 1653
```

```
## [1] 5286623
```

- The most commonly used data type in R is data frames, where each row represents an observation, and each column a variable.

```
##         name      start        end      party
## 1 Eisenhower 1953-01-20 1961-01-20 Republican
## 2    Kennedy 1961-01-20 1963-11-22 Democratic
## 3    Johnson 1963-11-22 1969-01-20 Democratic
## 4      Nixon 1969-01-20 1974-08-09 Republican
## 5       Ford 1974-08-09 1977-01-20 Republican
## 6     Carter 1977-01-20 1981-01-20 Democratic
```

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## R

- We use the `$` operator to access a variable within a data frame.

```r
presidential$name
```

```
##  [1] "Eisenhower" "Kennedy"    "Johnson"    "Nixon"      "Ford"       "Carter"     "Reagan"    
##  [8] "Bush"       "Clinton"    "Bush"       "Obama"
```

- Functions are (often) verbs, followed by what they will be applied to in parentheses.

```r
do_this(to_this)
do_that(to_this, to_that, with_those)
```
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## R

- In R, the fundamental unit of shareable code is the package.
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- Using R packages:
  - Install them from CRAN with `install.packages("x")`
  - Use them in R with `library(x)`
  - Get help on them with package `?x` and `help(package = "x")`

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