DANL 310 Lecture 17

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# DANL 310 Lecture 17
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## **R Markdown Basics and Tables**
### Byeong-Hak Choe
### April 14, 2022

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# R Markdown Basics
<html><div style='float:left'></div><hr color='#EB811B' size=1px width=796px></html>
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# Code chunks and inline R code

- You should define the object for the number in the code chunck, so that you can use that number in the narratives of the project document.

### R Markdown Code

```r
library(tidyverse)
oj <- read_csv('https://bcecon.github.io/dominick_oj.csv')
nvars <- format(round(ncol(oj), 0), 
 nsmall=0, 
 big.mark=",") 
nobs <- format(round(nrow(oj), 0), 
 nsmall=0, 
 big.mark=",") 
```

The number of variables is <code>&grave;r nvars&grave;</code>; the number of observations is <code>&grave;r nobs&grave;</code>.

### Output

The number of variables is 4; the number of observations is 28,947.

Roses are red, violets are blue.

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# Font color

- The Markdown syntax has no built-in method for changing text colors. We can use HTML syntax to change the formatting of words:

### R Markdown Code

```r
Roses are red, violets are blue.
```

### Output

Roses are red, violets are blue.

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# Spacing

- To add a space between paragraphs or lines, you can use ` `.

.pull-left[
### R Markdown Code

```r
One

Two
```
]

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### Output

One

Two
]

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# YAML

- Here is an example of the YAML metadata for an HTML document from R Markdown:

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### R Markdown YAML Example

```r
title: "TITLE_OF_YOUR_PROJECT"
subtitle: "SUBTITLE_OF_YOUR_PROJECT " 
author: 
 - "AUTHOR_1"
 - "AUTHOR_2"
 - 
date: "2022-04-14 "

output: 
  html_document:
    df_print: paged
    toc: true
    toc_depth: 2
    toc_float: true
    number_sections: true
    theme: united
    highlight: tango
```
]

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### `theme` 
- `theme` specifies the Bootstrap theme to use for the page (themes are drawn from the Bootswatch theme library). 
 - Valid themes include `default`, `bootstrap`, `cerulean`, `cosmo`, `darkly`, `flatly`, `journal`, `lumen`, `paper`, `readable`, `sandstone`, `simplex`, `spacelab`, `united`, and `yeti.`

- Pass `null` for no theme (in this case you can use the `css` parameter to add your own styles).

]

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# YAML

- Here is an example of the YAML metadata for an HTML document from R Markdown:

.pull-left[
### R Markdown YAML Example

```r
title: "TITLE_OF_YOUR_PROJECT"
subtitle: "SUBTITLE_OF_YOUR_PROJECT " 
author: 
 - "AUTHOR_1"
 - "AUTHOR_2"
 - 
date: "2022-04-14 "

output: 
  html_document:
    df_print: paged
    toc: true
    toc_depth: 2
    toc_float: true
    number_sections: true
    theme: united
    highlight: tango
```
]

.pull-right[
### `highlight`

- `highlight` specifies the syntax highlighting style.

- Supported styles include `default`, `tango`, `pygments`, `kate`, `monochrome`, `espresso`, `zenburn`, `haddock`, `breezedark`, and `textmate.` 
  
  - Pass `null` to prevent syntax highlighting.

]

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# Tables for Descriptive Statisics
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