Issue inserting image in header

Question

I'm writing a report using multiple R Markdown files, and to facilitate combining them I decided to use the bookdown package. I face a problem with inserting a logo as header using fancyhdr LaTeX package, that worked fine in a regular .Rmd file.

index.Rmd file:

---
documentclass: book
classoption: openany
site: bookdown::bookdown_site
subparagraph: true
output:
  bookdown::pdf_book:
    includes:
      in_header: preamble.tex
    toc_depth: 4
    latex_engine: xelatex # to receive Arial as font --> install.packages("xelatex") works for R users
link-citations: yes
fontsize: 12pt
linestretch: 1.25
---

The preamble.tex is:

\usepackage[german]{babel}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{geometry}
\usepackage{titlesec}
\usepackage{fancyhdr}

\usepackage{fontspec}
\setmainfont{Arial}

\pagestyle{fancy}\setlength\headheight{100pt}
\fancyhead[L]{\includegraphics[width=456px]{INS_logo.png}}
\fancyhead[R]{\includegraphics[width=4.1cm]{shurp-2018-logo-blue-transparent.png}}
\renewcommand{\headrulewidth}{0pt}
\rfoot{Seite \thepage \hspace{1pt} von \pageref{LastPage}}

\geometry{a4paper, total={170mm,257mm}, left=20mm, top=10mm, }

\titleformat{\chapter}
  {\normalfont\LARGE\bfseries}{\thechapter}{1em}{}
\titlespacing*{\chapter}{0pt}{3.5ex plus 1ex minus .2ex}{2.3ex plus .2ex}

Everything works fine except that the necessary logos don't appear in the header. Using the same code in a plain pdf_document format works fine.

I guess it has something to do with the book-option - does anyone know more here? I consulted https://bookdown.org/yihui/bookdown/, their github-repo as well as StackOverflow and the documentation on fancyhdr.

my sessioninfo (R Studio 1.2.1070):

R version 3.5.1 (2018-07-02)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS  10.14

Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

loaded via a namespace (and not attached):
 [1] compiler_3.5.1  backports_1.1.2 bookdown_0.7    rprojroot_1.3-2 htmltools_0.3.6 tools_3.5.1     yaml_2.2.0     
 [8] Rcpp_0.12.19.3  rmarkdown_1.10  knitr_1.20      xfun_0.4        digest_0.6.18   evaluate_0.12 

Thank you for any suggestions.

Answer 1

Are you sure that the images are not being pushed off the top off the page? Without your full directory, I am not able to reproduce your problem but it looks like you haven't specified a large enough top value within the geometry argument. Looking at the documentation to the geometry LaTeX function, you can see that this specifies the distance between the top of the body and the edge of the paper, leaving no space for your header.

Here is my reproducible example. It generates a dummy plot plot.png which is used for a logo placeholder

index.Rmd:

---
documentclass: book
classoption: openany
fontsize: 12pt
linestretch: 1.25
link-citations: yes
output:
  bookdown::pdf_book:
    includes:
      in_header: preamble.tex
    latex_engine: xelatex
    toc_depth: 4
subparagraph: yes
---

```{r setup, include=FALSE}
# Create an image to attach
png(filename = "logo.png", width = 200, height = 150, units = "px")
plot(cars)
box('figure', col = 'red')
dev.off()
```

# Title 1

Text

\newpage

## Section

Text

\newpage

Within the same directory is the preamble.tex. Note the adjusted geometry argument top=50mm:

\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{geometry}
\usepackage{titlesec}
\usepackage{fancyhdr}
\usepackage{fontspec}
\setmainfont{Arial}

\pagestyle{fancy}\setlength\headheight{100pt}
\fancyhead[L]{\includegraphics[width=4cm]{logo.png}}
\fancyhead[R]{\includegraphics[width=4.1cm]{logo.png}}
\renewcommand{\headrulewidth}{0pt}
\rfoot{Seite \thepage \hspace{1pt} von \pageref{LastPage}}

\geometry{a4paper, total={170mm,257mm}, left=20mm, top=50mm}

\titleformat{\chapter}
  {\normalfont\LARGE\bfseries}{\thechapter}{1em}{}
\titlespacing*{\chapter}{0pt}{3.5ex plus 1ex minus .2ex}{2.3ex plus .2ex}