R Notebook

vector related R codes

vector

# Create vector
Age <- c(4,6,5,7,5)

# View vector
Age #Age of children

## [1] 4 6 5 7 5

other types of vector

a <- 1:10
a

##  [1]  1  2  3  4  5  6  7  8  9 10

b <- seq(1,4,by=0.5)
b

## [1] 1.0 1.5 2.0 2.5 3.0 3.5 4.0

c <- rep(1:3, each=3)
c

## [1] 1 1 1 2 2 2 3 3 3

Select Position of Vector

Age [4]

## [1] 7

Age [-4]

## [1] 4 6 5 5

Age [-(2:4)]

## [1] 4 5

Mathmatical sign

Age [Age==5]

## [1] 5 5

Age+5

## [1]  9 11 10 12 10

Loop Function

Sequence (forloop)

for (i in 1:5) {
   j <- i+5
   print(j)
}

## [1] 6
## [1] 7
## [1] 8
## [1] 9
## [1] 10

if-else

i = -5

if (i>0) {
  print("Non-Negative")
} else {
  print ("zero or negative")
}

## [1] "zero or negative"