knitr::opts_chunk$set(echo = TRUE)
When you click the Knit button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document. You can embed an R code chunk like this:
summary(cars)
You can also embed plots, for example:
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.