This is an R HTML document. When you click the Knit HTML button a web page 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)

    ##      speed           dist
    ##  Min.   : 4.0   Min.   :  2.00
    ##  1st Qu.:12.0   1st Qu.: 26.00
    ##  Median :15.0   Median : 36.00
    ##  Mean   :15.4   Mean   : 42.98
    ##  3rd Qu.:19.0   3rd Qu.: 56.00
    ##  Max.   :25.0   Max.   :120.00

<jason>This is some text</jason>

You can also embed plots, for example:

    plot(cars)