Specifying multiple simultaneous output formats in knitr

Question

I would like to be able to specify multiple output formats at the same time, for instance html_document and a pdf_document. I know that this can be done very simply with something like

---   output: [html_document, pdf_document] --- 

I might have some of that syntax off, but I can not seem to find the documentation anywhere. I have recently discovered knitr-bootstrap and love it. It is what I have been looking for to be able to dynamically hide my code and output blocks.

Unfortunately, by default, the YAML block for the knitr-bootstrap invocation is quite complex and I do not know how to specify multiple outputs for this.

I have looked at the YAML spec and tried a few different things but I am at a loss. Below is my current YAML frontmatter.

--- title: "Beta Regression Comparison" opset: bootstrap output:   knitrBootstrap::bootstrap_document:     title: "Beta Regression Comparison"     theme: Simplex     highlight: Solarized - Light     theme.chooser: FALSE     highlight.chooser: FALSE     menu: FALSE   pdf_document --- 

Answer 1

The solution is to change pdf_document to pdf_document: default. I can't unfortunately find a reference for this syntax in the official documentation. If however you open a RMarkdown document in a recent version of RStudio, click Knit HTML and then Knit PDF, it uses this : default syntax.

The syntax is:

--- output:   html_document:     keep_md: yes   pdf_document: default --- 

Answer 2

In my case, I tried to knit multiple output-documents using bookdown and found this post which allowed me to get the desired result.

You can write the output-definition in your YAML header as follows:

--- output:   bookdown::pdf_document2:     template: "path-to-my-template"   bookdown::word_document2:     default knit: (function(inputFile, encoding){   rmarkdown::render(inputFile, encoding = encoding,   output_dir = "my-output-path", output_format = "all") }) ---