Produce PDF from Rmarkdown - r

Question

I am using rmarkdown in Rstudio to try to Knit a PDF using the example code provided by Rstudio (code below):
---
title: "Untitled"
output:
pdf_document:
keep_tex: yes
---
This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see <http://rmarkdown.rstudio.com>.
When you click the **Knit** button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document. You can embed an R code chunk like this:
```{r}
summary(cars)
```
You can also embed plots, for example:
```{r, echo=FALSE}
plot(cars)
```
Note that the `echo = FALSE` parameter was added to the code chunk to prevent printing of the R code that generated the plot.
But, I get the following error:
! pdfTeX error (font expansion): auto expansion is only possible with scalable
fonts.
\AtBegShi#Output ...ipout \box \AtBeginShipoutBox
\fi \fi
l.144 \end{document}
pandoc.exe: Error producing PDF from TeX source
Error: pandoc document conversion failed with error 43
In addition: Warning message:
running command '"C:/Program Files/RStudio/bin/pandoc/pandoc" +RTS -K512m -RTS test_rmarkdown.utf8.md --to latex --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash-implicit_figures --output test_rmarkdown.pdf --template "C:\Users\XXXX\Documents\R\win-library\3.2\rmarkdown\rmd\latex\default.tex" --highlight-style tango --latex-engine pdflatex --variable "geometry:margin=1in"' had status 43 Execution halted
My session info is shown below:
> sessionInfo()
R version 3.2.2 (2015-08-14)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] Rcpp_0.11.6 digest_0.6.8 MASS_7.3-43 grid_3.2.2 plyr_1.8.2 gtable_0.1.2 magrittr_1.5 scales_0.2.4
[9] ggplot2_1.0.1 stringi_0.4-1 reshape2_1.4.1 rmarkdown_0.8 proto_0.3-10 tools_3.2.2 stringr_1.0.0 munsell_0.4.2
[17] yaml_2.1.13 colorspace_1.2-6 htmltools_0.2.6
And I am running the complete TeXworks version 0.4.6 64-bit.

Answer 1

I had similar problems before.
Try to run devtools::install_github("rstudio/rmarkdown")
This worked for me.
If you dont have devtools you need to run this to:
install.packages("devtools")
library(devtools).