Required statistical concepts

Tiago A. Marques
12 July 2017

LOL - just kidding - I have done nothing else

A title and then a line of “=” delineates the start of a new slide in the .Rpres text file.

You can also include bullet points. Careful: The blank line before the first bullet point, and the space after the “-”, are obligatory.

  • Bullet 1
  • Bullet 2
  • Bullet 3

Slide With R Code

R code can be included in a slide like so. It will be executed when the presentation is compiled. By default, output generated by the code is also included in the slide. 

summary(cars)

     speed           dist       
 Min.   : 4.0   Min.   :  2.00  
 1st Qu.:12.0   1st Qu.: 26.00  
 Median :15.0   Median : 36.00  
 Mean   :15.4   Mean   : 42.98  
 3rd Qu.:19.0   3rd Qu.: 56.00  
 Max.   :25.0   Max.   :120.00

Slide With R code and no output

To include code but not its output, use the R code chunk option “results='hide'”.

summary(cars)

Slide displaying unevaluated R (or matlab) code

You can also display code without evaluating it by including the option eval=FALSE in the R code chunk. For example, the matlab code below wouldn't work in R, but we can display it anyway.

Learn more about R code chunk options online: https://yihui.name/knitr/options.

my_matrix = eye(7);

Slide With Plot

You can also include a graphic generated in R on-the-fly, without showing the code used to generate the figure. Options are available to control the size of the output figure (default units are inches).

plot of chunk unnamed-chunk-4

Slide With Bigger, Centered Plot

plot of chunk unnamed-chunk-5

Text Formatting

We can have bold and italicized text (and any other formatting you can specify in RMarkdown: see https://www.rstudio.com/wp-content/uploads/2016/03/rmarkdown-cheatsheet-2.0.pdf).

Slide With Two Columns

This stuff goes on the left:

Often we want to have two columns on a slide.

This stuff goes on the right:

We can!

Slide With Image and Text

This left column takes up 70% of the slide…

And the right column gets the rest.

Slide With Unequal-width Columns

alt text for image

We can also include figures or images *not generated on the fly – local files or online images both work.

Equations

You can also include equations inline: \( E = MC^2 \) (be careful not to leave whitespace adjacent to the $)

Or in display mode:

\[ e^{i\phi} = \text{cos}(\phi) + i\text{sin}(\phi) \]

More Help

For more help and examples, check out https://support.rstudio.com/hc/en-us/articles/200486468-Authoring-R-Presentations.