Custom CSS with knitr and markdown in R

Question

I found this great tutorial on how to modify the css formatting of a HTML report created with markdown and knitr in Rstudio. The post can be found here.

I was hoping to

Answer 1

Outside of RStudio (may work in it too - I'm not sure as I don't use it much), you can use option 'markdown.HTML.stylesheet' to set a custom style sheet. It will then import everything from your .css file into the newly created html file.

Here is an example:

## Set file names
htmlName <- "test.html"
rmdName <- gsub("html","Rmd", htmlName) 
stylesheetName <- 'style.css'

## Generate rmd file from R
sink(file = rmdName, type='output') 
    cat('\n') 
    cat("Hello World!") 
    cat('\n') 
sink()

## Generate style sheet from R
sink(file = stylesheetName, type='output') 
    cat("textarea {color: #a10000; }\n")
sink()

## Set knitr options and knit html
require(knitr) 
options(markdown.HTML.stylesheet = stylesheetName)
knit2html(rmdName, output = htmlName)