Windows Fonts in Rmd

sampleLatoReport.Rmd

---
title: "Sample Lato .Rmd"
author: "Carl Frederick"
date: "11/12/2018"
mainfont: Lato
output: 
  pdf_document: 
    latex_engine: xelatex

---

```{r, include = FALSE, echo = FALSE}
library(extrafont)
loadfonts(device = "win")
```


# Intro

This is Lato, cheers!

Apparently, the font doesn't carry over to tables made via `knitr::kable()`.

I have found this all works better with [TinyTeX](https://yihui.name/tinytex/) 
rather than [MiKTeX](https://miktex.org/).  To install TinyTeX:

```{r, eval = FALSE, echo = TRUE}
install.packages('tinytex')
tinytex::install_tinytex()
```

# Prerequisites

All of this is in the extrafont package readme 
<https://cran.r-project.org/web/packages/extrafont/README.html>, but to 
summarize:

In order to use Lato, you need to use the `extrafont` package: 

```{r, eval = FALSE, echo = TRUE}
install.packages(extrafont)
```

The first time you load extrafont you need to import the fonts on your 
computer:

```{r, eval = FALSE, echo = TRUE}
library(extrafont)
font_import()
```

After the first time, you simply need to load the imported fonts via: 

```{r, eval = FALSE, echo = TRUE}
loadfonts(device = "win")
```

For each file you create you need to embed the fonts (requires GhostScript)
using `embed_fonts()`.  See the package readme for details on this.

# Specifying which font to use

In the YAML header (between the --- --- lines at the top), specify 
`mainfont: Lato` and set the latex_engine to xelatex as in:

```
---
title: "title"
author: "author"
date: "MM/DD/YYYY"

mainfont: Lato
output: 
  pdf_document: 
    latex_engine: xelatex
---
```