Practice Assignment 2

Arithmetic Operations

#Addition of 3 Numbers
5+7+3

## [1] 15

#Subtraction of 2 Numbers
10-4

## [1] 6

#Multiplication of 2 Numbers 
5*5

## [1] 25

#Division of One Number by Another
12/6

## [1] 2

#Raising a Number to the 4th Power
4^4

## [1] 256

#3rd Root of a Number
(64)^(1/3)

## [1] 4

#Log to the base of a Number 
log(4,10)

## [1] 0.60206

Vectors

#Creating a Vector
c<- c(4,5,6,7,8,9)
#Choosing the 3rd Element in a Vector
c[3]

## [1] 6

#Determining the Length of a Vector
length(c)

## [1] 6

Matrix

#Creating a Matrix
d<- matrix(c(1,3,5,7,2,4,6,8),nrow=2, byrow=2)
#Adding 5 to Each Number in a Matrix 
F<- d+5
F

##      [,1] [,2] [,3] [,4]
## [1,]    6    8   10   12
## [2,]    7    9   11   13

#Determining Dimension of a Matrix 
dim(F)

## [1] 2 4

Data Types

#Assigning Values to Characters 
k<- 5.25
m<-'frank'
#Determining Data Type
class(k)

## [1] "numeric"

class(m)

## [1] "character"

#Converting Data Types 
p<- as.integer(k)
G<-as.character(k)
# k was converted to a character and a character cannot be added to a number so G+5.1 comes up as an error if attempting to run it

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