1.6 R as a calculator

R can be used as a calculator to carry out many different operations. Try each of the following.

5 + 5

## [1] 10

5 - 3

## [1] 2

4 * 4

## [1] 16

7 / 2

## [1] 3.5

(5 + 3) / 2

## [1] 4

3^2                 # Raising to a power

## [1] 9

sqrt(4)

## [1] 2

8^(1/3)             # Use the inverse of 3 to get the cube root

## [1] 2

log(100)            # Natural logarithm (base e = 2.71828...)

## [1] 4.605

log(100, base = 10) # You can change the base

## [1] 2

log10(100)          # Some bases have their own function

## [1] 2

log2(100)

## [1] 6.644

exp(1)              # Exponentiate

## [1] 2.718

abs(-5)             # Absolute value

## [1] 5