Menu
for some reason no link in my R markdowns (rmd) is formatted blue. knitting the simple rmd below to pdf is leaving the text color black. only when hovering over it does one realize that it's actually a link. knitting it to html will make the link blue. of course I can use a latex wrapper but I wonder why that is?
sessionInfo() R version 3.3.0 (2016-05-03) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 7 x64 (build 7601) Service Pack 1 loaded via a namespace (and not attached): knitr_1.15
RStudio 1.0.44
--- title: "R Notebook" output: pdf_document: default html_notebook: default --- ```{r, echo=F} # tex / pandoc options for pdf creation x <- Sys.getenv("PATH") y <- paste(x, "E:\\miktex\\miktex\\bin", sep=";") Sys.setenv(PATH = y) ``` [link](www.rstudio.com) 
969
To transform your markdown file into an HTML, PDF, or Word document, click the “Knit” icon that appears above your file in the scripts editor. A drop down menu will let you select the type of output that you want. When you click the button, rmarkdown will duplicate your text in the new file format.
No Knit HTML button This means that RStudio doesn't understand your document is supposed to be an RMarkdown document, often because your file extension is . txt . To fix this, go to the Files tab (lower right corner, same pane as Plots and Help) and select the checkbox next to your document's name.
Hyperlinks are created using the syntax [text](link) , e.g., [RStudio](https://www.rstudio.com) . The syntax for images is similar: just add an exclamation mark, e.g.,  . Footnotes are put inside the square brackets after a caret ^[] , e.g., ^[This is a footnote.] .
If a chunk works in R but not when you knit, it is almost always because you've changed a variable in your global working environment not using code in a chunk. Try restarting your R session and running each chunk sequentially to make sure all your variable values are up to date.
Add urlcolor: blue to the yaml.
--- title: "R Notebook" output: pdf_document: default html_notebook: default urlcolor: blue --- ```{r, echo=F} # tex / pandoc options for pdf creation x <- Sys.getenv("PATH") y <- paste(x, "E:\\miktex\\miktex\\bin", sep=";") Sys.setenv(PATH = y) ``` [Link to R Studio](www.rstudio.com) Bare urls will also be highlighted: http://www.rstudio.com 
141
To elaborate on the answer by @eipi10, and to answer a question in the comments by @Maarten Punt, the urlcolor is specifying the color for URL links referenced in the doc. However you might have links to other sections in your document, specified by linkcolor. So you can specify either:
--- title: "R Notebook" output: pdf_document: default urlcolor: blue linkcolor: red --- ## test links vs urls * see [the relevant section](#test) [link](http://www.rstudio.com) ```{r cars} summary(cars) ``` \newpage ## Including Plots{#test} You can also embed plots, for example: ```{r pressure, echo=FALSE} plot(pressure) ``` 
The red is a link within the document, whereas the blue is a URL link.
45
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
