Vector Operations

Vectorized Operations

R operates on entire vectors at once -- no loops needed:

x <- c(1, 2, 3, 4, 5)
cat(x * 2, "\n")     # 2 4 6 8 10
cat(x + 10, "\n")    # 11 12 13 14 15
cat(x ^ 2, "\n")     # 1 4 9 16 25

Element-wise Operations

When two vectors have the same length, operations are element-wise:

a <- c(1, 2, 3)
b <- c(10, 20, 30)
cat(a + b, "\n")  # 11 22 33
cat(a * b, "\n")  # 10 40 90

Summary Functions

R has built-in functions for summarizing vectors:

x <- c(4, 8, 15, 16, 23, 42)
cat(sum(x), "\n")    # 108
cat(mean(x), "\n")   # 18
cat(min(x), "\n")    # 4
cat(max(x), "\n")    # 42
cat(length(x), "\n") # 6

Your Task

Create a vector with the values 3, 7, 1, 9, 4. Print its sum and its mean on separate lines.