Nothing
Letter value plots are an alternative to boxplots which extend the number of "letter value" statistics used. For large datasets, this gives you more information about the tail behaviour and displays fewer "outliers".
You can install lvplot from CRAN with install.packages("lvplot")
or from GitHub with devtools::install_github("hadley/lvplot")
.
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.