Viewing Equations in Preview HTML after rendering

[jaredlander]

I have been experimenting with setting the Knit HTML button to use render and seem to have it working to my liking. It nicely URI-encodes images and CSS while calling out to a script for mathjax (something pandoc alone does not seem capable of doing, as far as I can tell).

When viewing the produced HTML file in Chrome, everything looks great, including equations. However, in the Preview HTML pane that opens after knitting (Ctrl+Shift+H) the equations are written as text. For some reason the mathjax equations are not rendering.

A barebones Rmd file follows:

---
title: "Portfolios"
author: "Jared P. Lander"
date: March 14, 2014
output:
  revealjs_presentation:
    mathjax: "default"
    center: true

---

# Portfolio Optimization

# Definitions

$n$ Assets  
$A_i$ Asset  

# Relative Investment
$$
    \sum_{i=1}^n w_i = 1
$$

And my settings are:

options(rstudio.markdownToHTML = 
            function(inputFile, outputFile) {
                rmarkdown::render(input=inputFile, output_format=revealjs_presentation(center=TRUE), output_file=outputFile, clean=TRUE)
            }
)

Is this an issue with the Preview window or something else?

[jjallaire]

You actually don't need to use rstudio.markdownToHTML to call render. If you get the current preview release of RStudio (http://www.rstudio.com/ide/download/preview) then it will call rmarkdown::render by default.

[jaredlander]

Got the preview release and without using rstudio.markdownToHTML it worked great, including showing the equations in the Preview Pane. Thanks!

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