| R Markdown with the Docco Classic StyleThis is an example of Markdown vignettes using the Docco style. DoccoTo use the Docco style for Markdown vignettes in an R package, you need to 
add *.Rmdfiles under thevignettesdirectoryadd Suggests: knitrandVignetteBuilder: knitrto theDESCRIPTIONfilespecify the vignette engine \VignetteEngine{knitr::docco_classic}in theRmdfiles (inside HTML comments) |  | 
| After building and installing the package, you can view vignettes via | browseVignettes(package = 'Your_Package')
 | 
| Examples |  | 
| Below are some code chunks as examples. | cat('_hello_ **markdown**!', '\n')
 | 
| hello markdown!  |  | 
| Normally you do not need any chunk options. | 1+1
 ## [1] 2
 10:1
 ##  [1] 10  9  8  7  6  5  4  3  2  1
 rnorm(5)^2
 ## [1] 2.36677 0.01204 0.26160 0.04578 0.03464
 strsplit('hello, markdown vignettes', '')
 ## [[1]]
##  [1] "h" "e" "l" "l" "o" "," " " "m" "a" "r" "k" "d" "o" "w" "n" " " "v" "i" "g"
## [20] "n" "e" "t" "t" "e" "s"
 | 
| Feel free to draw beautiful plots and write math \(P(X>x)=\alpha/2\). |  | 
| 
 | n=300; set.seed(123)
par(mar=c(4,4,.1,.1))
plot(rnorm(n), rnorm(n), pch=21, cex=5*runif(n), col='white', bg='gray')
 | 
| How does it work |  | 
| The markdown package (>= v0.6.2) supports custom HTML templates, and the doccoengine in knitr uses a custom template to compile Markdown to HTML: | head(knitr::rocco, 5)
 ##                                                                                   
## 1 function (input, ...)                                                           
## 2 {                                                                               
## 3     out = knit2html(input, ..., stylesheet = system.file("misc",                
## 4         "docco-classic.css", package = "knitr"), template = system.file("misc", 
## 5         "docco-classic.html", package = "knitr"))
 | 
| That is it. You probably have noticed that you can adjust the widths of the two columns
using your cursor. What is more, press Ton your keyboard, and see what
happens. |  |