[Tex/LaTex] no tex installation detected on RStudio after OS X 10.10 yosemite upgrade

knitrmacmactexrstudio

I upgraded my MAC to OS X 10.10 yosemite today. Now, when I run RStudio and try to use Knitr to compile pdf, it says no text installation detected. So, I did the following steps sequentially.

Install MacTeX
Install RStudio 2014-10-14 version (I had older version before)

This solved my problem. I have no idea how my problem is solved. My question: Is it the only way to solve this problem? Or is there any way I can configure RStudio to detect where Tex installation is?

I have looked at some discussions on previous MAC OS X upgrade with Tex problems here and here. I have also found some good discussion here which appears to be much close to my problem. But I wanted to have a definite clue on what is going on. I appreciate if anyone can give me some hints.

Best Answer

sudo ln -s /usr/texbin/pdflatex /usr/bin/pdflatex

this worked for me. the upgrade to yosemite broke the link and it needs to redone :)

you may first check for pdflatex in /usr/bin/. This is where rStudio looks.

cd /usr/bin/    
ls -a

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Launching TeXworks in the Terminal will work around an environment variable bug in OS X Yosemite. Assuming you have TeXworks installed in the /Applications folder, your command in Terminal would look like this:

/Applications/TeXworks.app/Contents/MacOS/TeXworks

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[Tex/LaTex] knit() doesn’t create .tex file with necessary preamble

knit() relies on knit_patterns to insert things into a document as it is being processed. The default patterns that knitr relies on are defined in the list all_patterns, which you can view by just typing all_patterns into an R session (assuming you have loaded knitr).

If you do this, you will see the following somewhere in the output.

$tex$header.begin
[1] "(^|\n)[^%]*\\s*\\\\documentclass[^}]+\\}"

In short, this is needed so that knitr knows where to put its default preamble for a .tex file.

To quote from Yihui's website for knitr:

header.begin: the pattern to find out where the document header begins; this is used to insert some header information into the output document (e.g. commands in the preamble in LaTeX, or CSS styles in HTML)

So, in order to get the correct output in test.tex, you need to make sure that your .Rnw file has a declared \documentclass{} in it.

Of course, you can change this if you want to by using knit_patterns$set().

So if you want to always use \input{report_preamble_en.tex} as your $tex$header.begin, then you can do the following to knit() the file:

library(knitr)
knit_patterns$set(header.begin = "(^|\n)[^%]*\\s*\\\\input\\{report_preamble_en.tex+\\}")
knit('test.Rnw')

Best Answer

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