5.1 Simple Vector Math

One of the advantages of R is in its ability to work with vectors.

• You can add a constant to each element of a vector.

  x <- 1:5
  2 + x

• You can multiply each element of a vector by a constant.

  x <- 1:5
  2 * x

• You can add two vectors together that are the same length.

  x <- c(1, 3, 5)
  y <- c(2, 4, 6)
  x + y

  Note that the elements in the same position of each vector are added together.

• You can multiply two vectors together that are the same length.

  x <- c(1, 3, 5)
  y <- c(2, 4, 6)
  x * y

  Note that the elements in the same position of each vector are multiplied together.

• You can raise each element of a vector to a power.

  x <- 1:5
  x^2