Rstudio knit to PDF

Question

The new version of Rstudio (0.98.932) has many new options including knit to PDF. An article describing the new version has a comment from Dave that says:

Answer 1

Adding on @nicholas response This is also why I create new .Rmd documents through the RStudio gui

File > New File > R markdown.

This way the YAML header is populated correctly.

Answer 2

I have just installed the new version of RStudio (0.98.932), which prompted me to upgrade a couple of packages (I can't remember which, although I see I have knitr 1.6, markdown 0.7 and rmarkdown 0.2.46). At first I had the same problem; there was only a single 'knit' option on the tool bar. I managed to get the ability to knit to .pdf by adding the following to the head of my .Rmd file.

---
title: "Sample Document"
output: pdf_document
---

Having done that, I now find I do have a drop down menu with options to knit to HTML, PDF and word. There's also a little gear icon that provides access to the R Markdown document options that wasn't there before. I have no idea what the problem was but it seems OK now!