Intro to Vectors in R
Student Information
Welcome
A vector is R’s basic container for a sequence of values of the same type. This short tutorial covers creating vectors, indexing them, and a couple of summary functions.
Creating vectors
The c() function (“combine”) builds a vector out of individual values:
You can pull out one element with [ ] and a position (R counts from 1, not 0):
Exercise: total and average
The sum() function adds up every element of a vector: sum(scores).
sum(scores)The mean() function averages every element of a vector: mean(scores).
mean(scores)