Webshot will automatically render web content for non-web formats such as PDF

rmd_formats_webshot.Rmd

---
title: "Untitled"
output:
  rmarkdown::github_document:
    html_preview: true
  html_document: default
  pdf_document: default
always_allow_html: yes
---

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

## Variable Formats

First install `webshot` and ensure `rmarkdown` and `knitr` are up to date. Add a `htmlwidget` and then `knit` to the file type of your choice. Formatting options can be set for each file type in the `YAML` header.

```r
install.packages("webshot")
webshot::install_phantomjs()
```


```{r widget}

library(c3)

data <- data.frame(a = abs(rnorm(20) * 10),
                   b = abs(rnorm(20) * 10),
                   date = seq(as.Date("2014-01-01"), by = "month", length.out = 20))

c3(data)

```