How to get images from the .tex folder (relative path) in Rmarkdown?

Question

I\'m trying to get a watermark image like here:

How to add a watermark image on rmarkdown?

I almost did it, but as I wrote on my original question the back

Answer 1

"It works for me." Here is a minimal Rmarkdown file, trimmed down from one of the templates offered by RStudio:

---
title: "Demo"
author: "Dirk"
date: "October 3, 2016"
output: pdf_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

## R Markdown

This is an R Markdown document. We include one figure

\includegraphics{Rlogo.png}

La fin.

I can hit the knit button just fine, or run this by hand:

/tmp$ cat includeDemo.Rmd
---
title: "Demo"
author: "Dirk"
date: "October 3, 2016"
output: pdf_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

## R Markdown

This is an R Markdown document. We include one figure

\includegraphics{Rlogo.png}

La fin.

/tmp$ Rscript -e 'rmarkdown::render("includeDemo.Rmd")'


processing file: includeDemo.Rmd
  |......................                                           |  33%
  ordinary text without R code

  |...........................................                      |  67%
label: setup (with options) 
List of 1
 $ include: logi FALSE

  |.................................................................| 100%
  ordinary text without R code


output file: includeDemo.knit.md

/usr/bin/pandoc +RTS -K512m -RTS includeDemo.utf8.md --to latex --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output includeDemo.pdf --template /usr/local/lib/R/site-library/rmarkdown/rmd/latex/default-1.15.2.tex --highlight-style tango --latex-engine pdflatex --variable graphics=yes --variable 'geometry:margin=1in' 

Output created: includeDemo.pdf
/tmp$ 

Maybe something is playing tricks with you by switching from the current directory to a temporary processing directory. In which an (icky!!) absolute path may help...

Answer 2

I just did it.

The problem were on MiKTeX for Windows.

I just followed the steps on this answer, remembering to assure that the folder is TDS-compliant (with a tex folder in it), and after I just put the image on the tex folder.