Section 26 Vector Operation: Mathematical Function

26.1 Arithmetic Function

Function	Explanation
round	Round to given number of decimal places
trunc	Truncate down to nearest whole number
ceiling, floor	Round values in a vector up (ceiling) or down (floor)
zapsmall	Replace values in a vector or matrix that are close to zero with 0
abs	Absolute (unsigned) value
sqrt	Square root
exp	Exponential
log, log10, log2	Log to base e, 10, and 2
sin, cos, tan	Trigonometric functions
asin, acos, atan	Inverse (arc) trigonometric functions
scale	Centering and scaling

x <- c(0, 2, 4, 6)

x+5

x-5

x*4

x/2

x^2

-x

sqrt(x)

exp(x)

scale(x)

x <- c(0, 2, 4, 6)
y <- c(4, -2, 7, 9)
x+y
x-y
x/y
x*y
exp(x) + exp(y)
sqrt(x) + sqrt(y)

x <- c(0, 2, 4, 6)
y <- c(4, -2)
x+y
x-y
x/y
x*y

x <- c(0, 2, 4, 6)
y <- c(4, -2, 7)
x+y
x-y
x/y
x*y