This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see http://rmarkdown.rstudio.com.

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:

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

You can also embed plots, for example:

Note that the echo = FALSE parameter was added to the code chunk to prevent printing of the R code that generated the plot.

Mean is 2.