Use googleCloudStorageR to automatically upload to Cloud Storage

knit_cloudstorage.rmd

---
title: "Host image files on Google Cloud storage"
author: "Michael Whitaker"
date: "January 12, 2017"
output:
    html_document:
        self_contained: false
---

```{r setup, include=FALSE}
library(knitr)
library(googleCloudStorageR)
opts_chunk$set(echo = TRUE)
opts_knit$set(upload.fun = function(file) {
  upload_try <- gcs_upload(file, name = basename(file), predefinedAcl = "publicRead")
  paste0("https://storage.googleapis.com/BUCKETNAME/",upload_try$name)
})
```

## R Markdown

The function in the above chunk uploads any generated images and adds the src URL automatically in the generated HTML file. Just change to your **BUCKETNAME** 

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 cars}
plot(cars)
```