This is an example package of using Literate Programming for developing R packages. Most R package authors probably write R code in the R scripts under the R/ directory, and use comments to explain code. This package shows that you do not have to develop a package in this way. You may write R code in R Markdown documents, and extract the code to the R/ directory automatically via knitr::purl(). At the same time, you will get a nicely formatted output document displaying the source code chunks as well as the text/prose chunks, and this output document can be a package vignette. Please see the package homepage for more details: http://yihui.name/rlp. This package is licensed under MIT, and you are welcome to file issues or submit pull requests. Let me also thank whomever invented holidays, which is often my most productive time. Oh I cannot live without holidays.