How to Increase Stack Space Overflow for Pandoc in R

How to increase stack space overflow for pandoc in R?

Solution: Add the following code snippet at the beginning of your Rmd file to increase the stack size:

title: "Habits"
pandoc_args: [
"+RTS", "-K64m",

Set margin size when converting from Markdown to PDF with pandoc

Recent versions of rmarkdown and pandoc

In more recent versions of rmarkdown, the settings of margins can be done in the YAML header via the top-level element geometry. What you specify in the geometry tag will be piped into the LaTeX template that ships with Pandoc via the following LaTeX snippet


For example, to specify margins that are 2cm in width one would include

title: "Habits"
author: John Doe
date: March 22, 2005
geometry: margin=2cm
output: pdf_document

For more complex specifications to be passed to the geometry LaTeX package, string options together as you would with LaTeX:

title: "Habits"
author: John Doe
date: March 22, 2005
geometry: "left=3cm,right=3cm,top=2cm,bottom=2cm"
output: pdf_document

Original answer

This is a LaTeX question as Pandoc is rendering to PDF via LaTeX - what you linked to represents the default margins on a LaTeX document.

The geometry LaTeX package for example can be used to alter the margins of the page. However you'll need a way to tell Pandoc to use this by including it ins the LaTeX header applied to the converted md file.

How you do this is documented in the Pandoc User Guide. See in particular the --template=FILE command line argument and the Templates section. Essentially, either find and modify the default template to include the LaTeX instructions you want to use or start your own template from scratch and place it in the appropriate location; see the --data-dir command line argument.

Another alternative if you are using a recent version of Pandoc is to use the variable argument (set either with -V KEY[=VAL] or --variable=KEY[:VAL]). The geometry package was added to the default LaTeX template in May 2012 (see this discussion). As such, if you wanted to change the page margins, you can use:

pandoc -V geometry:margin=1in -o output.pdf

You can specify multiple variable values too. For instance, if you wanted to create a 4 by 6 inch pdf with half-inch margins, you can use:

pandoc -V geometry:paperwidth=4in -V geometry:paperheight=6in -V geometry:margin=.5in -o output.pdf

How to extend Pandoc

The appropriate way to do this is to use a fenced div rather than inserting HTML directly into your markdown and trying to parse it later with LUA. Pandoc already allows you to insert custom styles and process them to both file types. In other words, it will take care of creating the appropriate HTML and LaTeX for you, and then you just need to style each of them. The Bookdown documentation references this here, but it simply points to further documentation here, and here.

This method will create both your custom classed div in html and apply the same style name in the LaTeX code.

So, for your example, it would look like this:

::: {.note data-latex=""}
This is a note.

The output in HTML will be identical to yours:

<div class="note">
<p>This is a note.</p>

And you've already got the CSS you want to style that.

The LaTeX code will be as follows:

This is a note.

To style that you'll need to add some code to your preamble.tex file, which you've already figured out as well. Here's a very simple example of some LaTeX that would simply indent the text from both the left and right sides:


Plot size and resolution with R markdown, knitr, pandoc, beamer

I think that is a frequently asked question about the behavior of figures in beamer slides produced from Pandoc and markdown. The real problem is, R Markdown produces PNG images by default (from knitr), and it is hard to get the size of PNG images correct in LaTeX by default (I do not know why). It is fairly easy, however, to get the size of PDF images correct. One solution is to reset the default graphical device to PDF in your first chunk:

```{r setup, include=FALSE}
knitr::opts_chunk$set(dev = 'pdf')

Then all the images will be written as PDF files, and LaTeX will be happy.

Your second problem is you are mixing up the HTML units with LaTeX units in out.width / out.height. LaTeX and HTML are very different technologies. You should not expect \maxwidth to work in HTML, or 200px in LaTeX. Especially when you want to convert Markdown to LaTeX, you'd better not set out.width / out.height (use fig.width / fig.height and let LaTeX use the original size).

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