TeX package not installing in R version 3.1.0

Question

I am trying to generate a pdf from .Rnw file using knitr package. Please find the output of sessioninfo() below

R version 3.1.0 (2014-04-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] knitr_1.6

loaded via a namespace (and not attached):
[1] evaluate_0.5.5 formatR_0.10   stringr_0.6.2  tools_3.1.0 

I have installed knitr but am unable to compile the code in the .Rnw file. There is a popup that is saying "No TeX installation detected. Please install TeX before compiling". However both TeX and pdfLaTeX is not installing for this version of R, a warning message comes saying that TeX or pdfLaTex is not available.

Thanks in advance.

Answer 1

As a convenience, the installr R package is a very convenient way to install TeX--and a bunch of other useful stuff. Just run installr::installr() and pick MikTeX (at least). (Not sure if it works for non-Windows.)

Answer 2

Wrapping my comment into an answer. knitr uses pdflatex to generate a pdf. pdflatex is a part of TeX/LaTeX installation, which is not an R package and cannot be installed using R terminal (at least natively, because installr can actually do this, as indicated by @Gregor).

You need TeX installation on your machine to work properly with knitr. There are several options, with Miktex for Windows or TexLive for linux.

Take a look at the minimal example shipped with knitr. It starts with \documentclass{article}, which is a typical first line of a TeX file.

As a final note, R markdown can produce HTML using pandoc instead, so it does not require TeX and may be a good alternative if you prefer not to use TeX/LaTeX.

Answer 3

Step 1: Download and Install MiKTeX from http://miktex.org/2.9/setup

Step 2: Run

Sys.getenv("PATH") 

in R studio This command returns the path where Rstudio is trying to find pdflatex.exe In windows (64-bit) it should return C:\Program Files\MiKTeX 2.9\miktex\bin\x64\pdflatex.exe If pdflatex.exe is not located in this location Rstudio gives this error code 41.

Step 3: To set this path variable run:

Sys.setenv(PATH=paste(Sys.getenv("PATH"),"C:/Program Files/MiKTeX 2.9/miktex/bin/x64/",sep=";"))