Introduction to DATA607 CUNY SPS

R Markdown from R Studio - Intro

R Markdown provides an authoring framework for data science. You can use a single R Markdown file to both

• save and execute code *generate high quality reports that can be shared with an audience

R Markdown documents are fully reproducible and support dozens of static and dynamic output formats. This 1-minute video provides a quick tour of what’s possible with R Markdown:

Installation

Like the rest of R, R Markdown is free and open source. You can install the R Markdown package from CRAN with:

install.packages("rmarkdown")

R Markdown Cheatsheet R Markdown Reference Guide

Viridis colors

Code below demonstrates to color palettes in the viridis package. Each plot displays a contour map of the Maunga Whau volcano in Auckland, New Zealand.

Magma colors

colorFunc <- "heat.colors"
# colorFunc <- "terrain.colors"
# colorFunc <- "topo.colors"
# colorFunc <- "cm.colors"
# colorFunc <- "rainbow"

Heat color example

Simple Demo languages

Bash

ls *.Rmd

Python

x = 'hello, python world!'
print(x.split(' '))

marmap

data(list = params$data)
autoplot(get(params$data))

Tables

Below packages are for tables

• xtable
• stargazer
• pander
• tables
• ascii
• etc.

It is also very easy to make tables with knitr’s kable function:

Note the use of the results=‘asis’ chunk option. This is required to ensure that the raw table output isn’t processed further by knitr.

A knitr kable.

	mpg	cyl	disp	hp	drat	wt	qsec	vs	am	gear	carb
Mazda RX4	21.0	6	160	110	3.90	2.620	16.46	0	1	4	4
Mazda RX4 Wag	21.0	6	160	110	3.90	2.875	17.02	0	1	4	4
Datsun 710	22.8	4	108	93	3.85	2.320	18.61	1	1	4	1
Hornet 4 Drive	21.4	6	258	110	3.08	3.215	19.44	1	0	3	1
Hornet Sportabout	18.7	8	360	175	3.15	3.440	17.02	0	0	3	2

Markdown Basics

You can use Pandoc’s Markdown to make:

A level-one header

Headers

A level-two header

ATX-style level-two header

ATX-style level-three header

A level-one header with a link and emphasis

I like several of their flavors of ice cream: #22, for example, and #5.

Header Attributes

{#identifier .class .class key=value key=value}

Level-one header

My header

My other header

Level-one unnumbered header

Level-one unnumbered header

Dogs?–in my house?

Lists

Bullet Lists

• one

• two

• three

• one

• two

• three

• here is my first list item.

• and my second.

• here is my first list item.

• and my second.

The four-space rule

• First paragraph.

  Continued.

• Second paragraph. With a code block, which must be indented eight spaces:

  { code }

• fruits

  • apples
    • macintosh
    • red delicious
  • pears
  • peaches

• vegetables

  • broccoli
  • chard

• A lazy, lazy, list item.

• Another one; this looks bad but is legal.

  Second paragraph of second list item.

Ordered Lists

1. one
2. two
3. three

and this one:

5. one
6. two
7. three

fancy_lists

1. one
2. two

Extension: startnum

9. Ninth
10. Tenth
11. Eleventh
    1. subone
    2. subtwo
    3. subthree

2. Two
3. Three

1. Four

• Five

Default Marker

1. one
2. two
3. three

Term 1

: Definition 1

Term 2 with inline markup

Definition 2

{ some code, part of Definition 2 }

Third paragraph of definition 2.

Links

Automatic Links

http://google.com sam@green.eggs.ham

Inline links

This is an inline link, and here’s one with a title.

Emails need the prefix mailto

Write me!

Reference Links

Test label 1

Test label 2

Test label 3

With angle brackets

With title

Using link labels

Here is my link

Internal link

See the Introduction.

• Block quotes
• Latex Equations
• Horizontal rules
• Tables
• Footnotes
• Bibliographies and Citations
• Slide breaks
• Italicized text
• Bold text
• Superscripts
• Subscripts
• Strikethrough text