Description
Format for converting from R Markdown to a Beamer presentation.
Usage
Arguments
TRUE to include a table of contents in the output (onlylevel 1 headers will be included in the table of contents).
The heading level which defines individual slides. Bydefault this is the highest header level in the hierarchy that is followedimmediately by content, and not another header, somewhere in the document.This default can be overridden by specifying an explicitslide_level.
TRUE to number section headings
You can also produce a PDF slide show using LaTeX beamer, or slides shows in Microsoft PowerPoint format. Here’s the Markdown source for a simple slide show, Demo.md: - title: - AI Playground author: - Ashwin Kumar K theme: - Copenhagen date: - March 22, 2020 - # What's AI? R Markdown documents can have optional metadata that is used to generate a document header that includes the title, author, and date. For more details see the documentation on R Markdown metadata. R Markdown documents also support citations.
The first official book authored by the core R Markdown developers that provides a comprehensive and accurate reference to the R Markdown ecosystem. With R Markdown, you can easily create. Jan 17, 2021 The problem with R Markdown beamer is that the official cookbook only covers limited features. In most cases, it’s better to use a LaTex template to start with in R Markdown. In this way, you can do all the fancy customization in the LaTex template and in R Markdown you just fill the content of your slides.
TRUE to render slide bullets incrementally. Notethat if you want to reverse the default incremental behavior for anindividual bullet you can precede it with >. For example:> - Bullet Text
Default width (in inches) for figures
Default height (in inches) for figures
TRUE to automatically apply the pdfcrop utility(if available) to pdf figures
TRUE to render figures with captions
Graphics device to use for figure output (defaults to pdf)
Method to be used for printing data frames. Valid valuesinclude 'default', 'kable', 'tibble', and 'paged'. The 'default' methoduses a corresponding S3 method of print, typicallyprint.data.frame. The 'kable' method uses theknitr::kable function. The 'tibble' method usesthe tibble package to print a summary of the data frame. The 'paged'method creates a paginated HTML table (note that this method is only validfor formats that produce HTML). In addition to the named methods you canalso pass an arbitrary function to be used for printing data frames. Youcan disable the df_print behavior entirely by setting the optionrmarkdown.df_print to FALSE. SeeDataframe printing section in bookdown book for examples.
Beamer theme (e.g. 'AnnArbor').
Beamer color theme (e.g. 'dolphin').
Beamer font theme (e.g. 'structurebold').
Syntax highlighting style. Supported styles include'default', 'tango', 'pygments', 'kate', 'monochrome', 'espresso','zenburn', and 'haddock'. Pass NULL to prevent syntax highlighting.
Pandoc template to use for rendering. Pass 'default' to usethe rmarkdown package default template; pass NULL to use pandoc'sbuilt-in template; pass a path to use a custom template that you'vecreated. See the documentation onpandoc online documentation fordetails on creating custom templates.
Keep the intermediate tex file used in the conversion to PDF
Keep the markdown file generated by knitting.
LaTeX engine for producing PDF output. Options are'pdflatex', 'lualatex', and 'xelatex'.
The LaTeX package to process citations, natbibor biblatex. Use default if neither package is to be used,which means citations will be processed via the commandpandoc-citeproc.
Whether to generate a full LaTeX document (TRUE)or just the body of a LaTeX document (FALSE). Note the LaTeXdocument is an intermediate file unless keep_tex = TRUE.
Named list of additional content to include within thedocument (typically created using the includes function).
Markdown extensions to be added or removed from thedefault definition or R Markdown. See the rmarkdown_format foradditional details.
Additional command line options to pass to pandoc
Value
R Markdown output format to pass to render
Details
See the onlinedocumentation for additional details on using the beamer_presentationformat.
Creating Beamer output from R Markdown requires that LaTeX be installed.
R Markdown documents can have optional metadata that is used to generate adocument header that includes the title, author, and date. For more detailssee the documentation on R Markdown metadata.
R Markdown documents also support citations. You can find more information onthe markdown syntax for citations in theBibliographiesand Citations article in the online documentation.
Examples
There are different ways out there to create slides for talks. One used a lot in academia is LaTeX Beamer. For the unknowing, in short, Beamer allows to generate PDF slides by relying on the comprehensive typesetting greatness of LaTeX.
Compared to WYSIWYG tools like Powerpoint and Keynote, LaTeX Beamer has a high getting-started threshold of learning the keywords and peculiarities, which is inherent to all things LaTeX. This makes it unappealing for beginners, but also somewhat reduces productivity for experienced users.
But fear not! There’s a well-working converter from the great markup language Markdown to LaTeX Beamer slides. And this is how it works.
TL;DR: Pandoc can convert Markdown to PDF slides using LaTeX Beamer. It works out of the box, but can easily be extended. Apart from LaTeX Beamer, also HTML slideshows using reveal.js (and others) are possible from the same source file.
Pandoc
- Options and Features
- Easy & Out of the Box: Markdown → PDF with Pandoc
- Comprehensive & Flexible: Markdown → LaTeX → PDF with Pandoc and pdflatex / latexmk
Pandoc allows for conversion between different markup languages. It can convert between docx, HTML, LaTeX, and Markdown. Especially the latter two are quite interesting; using Pandoc, you can write texts in the highly productive language of Markdown but have it set to PDF using the capabilities of LaTeX.1 Try out the capabilities of Pandoc yourself on pandoc.org/try/.
From
Pandoc generates
and will add the corresponding headers if you add the standalone option (--standalone) to the pandoc command line call.
The really cool thing? Pandoc also supports LaTeX Beamer. The above snippet would be set to one Beamer slide:
Easy! Pandoc also supports converting the Markdown-written slides to other targets, like HTML presentations using reveal.js and others. Since I was not able to convert the presentation template of my institute to a reveal.js template I have not really dug too much into this.2
Options and Features
A very concise example of the conversion abilities can be found at the Pandoc demo page. From input to output.
Basic LaTeX Beamer Support
The full support for LaTeX and LaTeX Beamer from Pandoc is outlined in its documentation. Here are some basics.
Pandoc can use each first-level headline to create a new slide with the headline as the slide’s title. This is a harsh over-simplification, see the footnote.3 Also, horizontal rules (-----) start new slides.
Lists, ordered and unordered, are taken from their Markdown format (* Something and 1. Anything) to their respective LaTeX commands (itemize and enumerate).
Also pictures can be included (Markdown syntax: ).4
List items can appear by prepending the list item with a > (i.e. > * Something), pauses can be added on a slide by three one-space-interleaved dots (. . .).
To put a Beamer slide into one of the special modes, different attributes can be used. For instance, using # Title {.fragile} will lead to begin{frame}[fragile]{Title}, the mode needed for code highlighting e.g. with minted.
YAML
Through commented keywords at the beginning of the Markdown file, global parameters of the presentation can be set. The keywords are written in a YAML metadata manner.
For example, variables like author, title (and subtitle), and date of the presentation can be set:
At the same place, Beamer themes can be chosen (using theme, et al.). Also, further LaTeX options can be specified (fontfamily, toc, …) and features of the (Beamer) document enabled, like using BibLaTeX (biblatex: true)5 or proper tables with booktabs (tables: true).
Behind the curtains, the YAML variables are passed through to the template used for conversion where they can be used as triggers or options.
A very handy keyword in the YAML metadata is header-includes, which allows injecting LaTeX code into the header. Useful for including certain packages or even whole .tex files with display configurations:6
Additionally to the header-includes YAML, there are also include-before and include-after. They inject something right at the beginning and just before the end of the content body of the document, respectively.
Easy & Out of the Box: Markdown → PDF with Pandoc
The easiest way to get your Markdown slides set in LaTeX Beamer PDF is with the following line
Some Options
Say, you like to change the font of your presentation? Easy! Just add the following to the YAML
and tell Pandoc to use the XeLaTeX engine with pandoc --to=beamer -o slides.pdf slides.md --latex-engine=xelatex.7
You have a package which uses shell commands via the --shell-escape mechanism? Just append --latex-engine-opt=-shell-escape to the command.
Polk audio rm6750 manual pdf. There’s a lot more trickery which can be done. Just have a look at man pandoc.
Comprehensive & Flexible: Markdown → LaTeX → PDF with Pandoc and pdflatex / latexmk
Although super sleek, I encountered one problem with the immediate conversion from Markdown to PDF: I couldn’t use a certain package (minted). So I split up the process: Use Pandoc to generate a .tex file from the Markdown input and use a usual means of typesetting8 to finalize the processing to a PDF.
With a small wrapper script you don’t even feel a difference but have the added flexibility of configuring the pdflatex call directly.
Temp Files Problem
So, minted. minted is, in my mind, the best code highlighting package for LaTeX out there. As a backend, it uses the Python program Pygments to generate colored code snippets.
To do so, it needs to escape to the shell. No problem, you say, haven’t I just introduced latex-engine-opts=-shell-escape? True! But minted creates temporary files in the document’s root directory. And because Pandoc happily copies the automatically generated .tex file to some randomly chosen temporary location and changes the -output-directory value of pdflatex, the document’s root directory can not be found. minted offers the outputdir=<directory> package option, but there is no way to predict where Pandoc will copy the the temporary files to. At least to my knowledge.
After a short discussion with the minted people, I split up the process of PDF slide generation.
Two-Step Process
Essentially, the two needed commands are
Or pdflatex slides.tex if you rather use that program. But, remember, you can configure a lot in latexmk with the .latexmkrc file. Here’s mine.
If you combine the two calls into one script, you don’t even feel the difference. As an example: My run.py file which has also a few additional options.
Beamer Rmarkdown
Custom Template
One more thing before we are done: I modified the default beamer template9 of Pandoc to include an institute, since that’s one of Beamer’s default macros. Just add
Latex Beamer Markdown
somewhere after the if clause of $if(author)$. Use it with a instute: My University in the YAML part of your presentation. An alternative to changing the template would be to put it into the header-includes command.
Xtrons launcher. LaTeX Beamer enables programmatically writing slides with LaTeX, creating a PDF file as output. Pandoc can convert the easy Markdown markup language to Beamer slides with one simple command. If you make two commands out of the one, you are more flexible in typesetting. Pandoc’s conversion engine can be configured by some statements in the top of the file. Pack all your LaTeX customization in one .tex file and include it via header-includes.
Markdown Beamer Box
In fact, this blog is also written entirely in Markdown. ↩
The problem with a FZJ reveal.js template is somewhat reveal.js-conceptual: Our design has very distinctly designed borders, for example a colorful bar at the very left of each slide. I was not able to implement this to a reveal.js, looking both correct (and well) in the usual presentation mode, but also in the PDF print mode at the same time. Sofia pro font free. The latter is important since most scientific conferences expect talks in a static PDF format, not a fancy HTML file. I would gladly appreciate a port of the FZJ presentation template to any form of JavaScript-based presentation engines! ↩
Pandoc uses that headline level as a slide separator which is, throughout the whole document, only followed directly by text and no other (lower level) headline.
Like this, the document can be structured a bit more into sections aside from slides: Headers, above the slide-seperator headline level are used to create title slides. In general,
--slide-levelcan be used to manually override the behavior. See the documentation. ↩Up to now, I fell back on using
includgraphics{}directly in the Markdown code since the ability to specify image dimensions in Markdown was only a very recent addition to the Pandoc parser.Now, one can specify for example the width of an image like this:
{ width=90% }, which will be converted toincludegraphics[width=0.9textwidth]{img/nice.pdf}. Before, it was using the full width of the slide, which was not working properly for the template I’m using. ↩If you can use BibLaTeX, you should use BibLaTeX. Always. It’s far superior than BibTeX, more modern, and has a much greater feature set. It’s also quite backwards compatible, you can transition smoothly on your own time. ↩
In my example here, you can use the file
_header.texto include further LaTeX code you don’t want to clutter the Markdown file with. Like your favorite font package, somehypersetup{}commands, or your default set of packages. See remarks on how I use it a bit later in this posting. ↩Finally! You can set those beautiful Beamer slides with your favorite font, Comic Sans MS! ↩
Just advertising it here quickly: Please use
latexmkas yourMakefile-esk interface topdflatex(or XeLaTeX, or LuaLaTeX, or …)! It will help you out a lot! It will automatically detect how many runs are necessary until your document is stable; it can be steered using a.latexmkrcfile; and it has a great continuous preview mode, which compiles your document automatically once it’s changed and opens a previewer afterwards:latexmk -pdf -pvc document.tex! ↩Also, I needed to exchange
frame{titlepage}withmaketitle, because my template wants it this way. ↩