R: Math Functions

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R has a number of built-in math functions. Below you will find a an example of some of the most commonly used math functions.

R CODE

2 + 4 * 5      # Order of operations
log (10)       # Natural logarithm with base e=2.7182
log10(5)      # Common logarithm with base 10
5^2             # 5 raised to the second power
5/8             # Division
sqrt (16)      # Square root
abs (3-7)     # Absolute value 
pi                # 3.14
exp(2)         # Exponential function 
round(pi,0)  # Round pi to a whole number
round(pi,1)  # Round pi to 1 decimal place
round(pi,4)  # Round pi to 4 decimal places
floor(15.9)   # Rounds down
ceiling(15.1)  # Rounds up
cos(.5)        # Cosine Function
sin(.5)        # Sine Function
tan(.5)       # Tangent Function
acos(0.8775826)        # Inverse Cosine
asin(0.4794255)       # Inverse Sine
atan(0.5463025)      # Inverse Tangent

R OUTPUT

> 2 + 4 * 5      # Order of operations
[1] 22
> log (10)       # Natural logarithm with base e=2.7182
[1] 2.302585
> log10(5)      # Common logarithm with base 10
[1] 0.69897
> 5^2             # 5 raised to the second power
[1] 25
> 5/8             # Division
[1] 0.625
> sqrt (16)      # Square root
[1] 4
> abs (3-7)     # Absolute value
[1] 4
> pi                # 3.14
[1] 3.141593
> exp(2)         # Exponential function
[1] 7.389056
> round(pi,0)  # Round pi to a whole number
[1] 3 
> round(pi,1)  # Round pi to 1 decimal place
[1] 3.1 
> round(pi,4)  # Round pi to 4 decimal places
[1] 3.1416
> floor(15.9)   # Rounds down
[1] 15
> ceiling(15.1)  # Rounds up
[1] 16
> cos(.5)         # Cosine Function
[1] 0.8775826
> sin(.5)          # Sine Function
[1] 0.4794255
> tan(.5)         # Tangent Function
[1] 0.5463025
> acos(0.8775826)        # Inverse Cosine
[1] 0.4999999
> asin(0.4794255)       # Inverse Sine
[1] 0.5
> atan(0.5463025)      # Inverse Tangent
[1] 0.5

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