RStudio

Keyboard Shortcuts

You can find shortcuts in the dropdown menu “Help” -> “Keyboard Shortcuts Help”, or online

I want to draw your attention to these shortcuts, in particular, as they are use quite often:

Description	Windows	Mac
Keyboard help	`Alt`+`Shift`+`k`	`option`+`Shift`+`k`
Insert assignment operator `<-`	`Alt`+`-`	`option`+`-`
Insert pipe operator `%>%`	`Ctrl`+`Shift`+`m`	`Cmd`+`Shift`+`m`
Insert multiple cursors	`Ctrl`+`Alt`+ `L Mouse`	`Ctrl`+`option`+ `L Mouse`
Insert code chunk `{r}`	`Ctrl`+`Alt`+ `i`	`Ctrl`+`option`+ `i`
Comment out lines `#`	`Ctrl`+`Shift`+`c`	`Cmd`+`Shift`+`c`
Search active document	`Ctrl`+`f`	`Cmd`+`f`

RMarkdown

RMarkdown documents begin with a yaml header which passes arguments to pandoc (the program that creates the document). The options that can be specified in the yaml header are document-specific. Some arguments that exist for all types of documents include title, author, date, and output.

Overview

You can see a cheatsheet for RMarkdown under “Help” -> “Cheetsheets” -> “R Markdown Cheetsheet”.

Some useful things to know:

Enclosing text in single * italicizes
Enclosing text in double * bolds
Enclosing text in triple * bold italics
Prefacing something with a \ means “do not evaluate”
Adding a break between lines starts a new paragraph
Enclosing text in backticks ` code formats
Starting text with a > creates a…

…block quote paragraph that can span multiple lines

Enclosing text with ^ creates a superscript²
Enclosing text with ~ creates a subscript₂
Enclosing text with double ~~ creates a ~~strikethrough~~
Code in RMarkdown is wrapped in three backticks ` followed at the beginning by {r}

```{r}

Code would go here.

```

Code in-line is inserted with one backtick `
Enclosing text with brackets “[” and then “(” links to other websites/documents
- This is a link
Starting text with - creates a bulleted list
- Indenting four spaces and then using - creates a sub-bullet
Starting text with a number and period (1.) creates an ordered list
1. My point 1
2. My point 2
Starting text with up to six # creates differently formatted headers:

Header I

Header II

Header III

Header IV

Header V

Header VI

Header VII (does not work)

Placing an image is done by starting with a !
- The path can either be a local path or a website

Just an image:

You can resize an image by including curly brackets { at the end and a height/width specifer within them (e.g., width=50%):

RStudio & RMarkdown Tips

Daniel N. Albohn

9/14/2017