009-slides.md
In parsermd: Formal Parser and Related Tools for R Markdown Documents

% Writing beautiful and reproducible slides quickly % Yihui Xie % 2012/04/30

Why

after you finished typing \documentclass{beamer} and \title{}, I have finished my first slide with markdown
far fewer commands to remember, e.g. to write bullet points, just begin with a dash "-" instead of \begin{itemize} and \item; how things can be simpler?
I know you want math to show you are a statistician, e.g. $f(k)={n \choose k}p^{k}(1-p)^{n-k}$
you do not need to maintain output -- only maintain a source file
HTML5/CSS3 is much more fun than LaTeX

A bit R code

head(cars)

##   speed dist
## 1     4    2
## 2     4   10
## 3     7    4
## 4     7   22
## 5     8   16
## 6     9   10

cor(cars)

##        speed   dist
## speed 1.0000 0.8069
## dist  0.8069 1.0000

Graphics too

library(ggplot2)
qplot(speed, dist, data = cars) + geom_smooth()

A scatterplot of cars

How

source editor: RStudio (perfect integration with knitr; one-click compilation); currently you have to use the version >= 0.96.109
HTML5 slides converter: pandoc; this document was generated by: pandoc -s -S -i -t dzslides --mathjax knitr-slides.md -o knitr-slides.html
the file knitr-slides.md is the markdown output from its source: library(knitr); knit('knitr-slides.Rmd')
or simple click the button Knit HTML in RStudio

For ninjas

you should tweak the default style; why not try some Google web fonts? (think how painful it is to wrestle with fonts in LaTeX)
pandoc provides 3 types of HTML5 slides (dzslides is one of them)
you can tweak the default template to get better appearances
if you have come up with a better dzslides template, please let me know or contribute to pandoc directly (e.g. pre blocks should have max-width and max-height)

For beamer lovers

pandoc supports conversion to beamer as well. period.

For Powerpoint lovers

Reproducible research

It is good to include the session info, e.g. this document is produced with knitr. Here is my session info:

print(sessionInfo(), locale = FALSE)

## R version 4.4.0 (2024-04-24)
## Platform: x86_64-pc-linux-gnu
## Running under: Ubuntu 22.04.4 LTS
## 
## Matrix products: default
## BLAS:   /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3 
## LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/libopenblasp-r0.3.20.so;  LAPACK version 3.10.0
## 
## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base     
## 
## other attached packages:
## [1] ggplot2_3.5.1 knitr_1.46.4 
## 
## loaded via a namespace (and not attached):
##  [1] vctrs_0.6.5      nlme_3.1-164     cli_3.6.2        rlang_1.1.3     
##  [5] xfun_0.44        highr_0.10.2     labeling_0.4.3   glue_1.7.0      
##  [9] colorspace_2.1-0 formatR_1.14     scales_1.3.0     fansi_1.0.6     
## [13] grid_4.4.0       munsell_0.5.1    evaluate_0.23    tibble_3.2.1    
## [17] lifecycle_1.0.4  compiler_4.4.0   codetools_0.2-20 pkgconfig_2.0.3 
## [21] mgcv_1.9-1       farver_2.1.2     lattice_0.22-6   digest_0.6.35   
## [25] R6_2.5.1         utf8_1.2.4       pillar_1.9.0     splines_4.4.0   
## [29] magrittr_2.0.3   Matrix_1.7-0     tools_4.4.0      withr_3.0.0     
## [33] gtable_0.3.5