12.1 Bookdown Insert Image From URL

20210316

With multiple output targets, such as html and latex, we need a little care in ensuring each is supported. A common use case is to include an image from a specific URL with the html document. This is accomplished with markdown:

![](https://bit.ly/3lfNVG6)

However for latex output the path is expected to be a local path to the image file. Instead we can utilise knitr::include_url():

 if (knitr::is_html_output())
 {
   knitr::include_graphics("https://bit.ly/3lfNVG6")
 } else {
   knitr::include_url("https://bit.ly/3lfNVG6")
 }

This might be included in an R code block that begins with:

{r echo=FALSE, fig.align="left", out.width="50%"}

An image can be resized:

![](graphics/mypic.png]{width=40%}


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