How do I calculate simple statistics like mean and median?

Answer 1

Let's say you want to calculate the mean and median for the following set of values: 1, 5, 8, 9, 2.

To calculate the mean you can type the following commands into the R command line or console:

mean(c(1, 5, 8, 9, 2))

median(c(1, 5, 8, 9, 2))

To avoid repeating yourself, you could first assign that list of numbers to an object that we will call x:

x <- c(1, 5, 8, 9, 2)

And then type:

mean(x)

median(x)