Section 16 Vector: Numeric

16.1 Functions

Function	Concept	Example
c	Concatenate	c(2,4,6,8,10)
:	Colon	c(1:10)
seq	Sequence	seq(from=10, to=20, by=2)
rep	Repeat	rep(x=c(2,4), each=10)

16.2 Example: Numeric vector

x <- c(5L, 8L, 10L)
x
class(x)


y <- 1:5
y
class(y)


z <- c(3.5, 8.9, -1.5)
z
class(z)


m <- c(-5:5)
m
class(m)


a <- c(2, 4, 6)
a
class(a)


b <- c(1:5, 3, 4, 5)
class(b)


m <- 1:5
n <- 11:15
p <- c(m,n)
class(p)


x <- vector('numeric', length = 10)
x

16.3 Example: seq

seq(from = 1, to = 1, by = ((to - from)/(length.out - 1)), length.out = NULL, along.with = NULL, ...)

x <- seq(from=0, to=5, by=1)
x

y <- seq(from=-2, to=10, by=2)
y

z <- seq(from=1, to=11, by=3)
z


a <- seq(from=4, to=20, length.out=5)
a


seq(10) # same as 1:10

16.4 Example: rep

x <- rep(x=2, times=5)
x

y <- rep(x=2, length.out=5)
y

z <- rep(x=c(2,3), times=5)
z


a <- rep(x=c(2,3), each=5)
a

b <- rep(x=c(2,3), each=5, times=2)
b

c <- rep(x=c(2,3), each=5, length=12)
c

rep(10) # same as 10