R Class

Class

//Basic Syntax :
	x <- 123
	y <- 234
	z <- sum(x,y)
	print(z)
	[1] 357

The above code is explained below:

• x and y are objects in R

• the objects x and y hold the values 123 and 234 respectively. Based on the kind of values an object holds, their datatype is decided and assigned. Datatype in R is known as class of an object.

• sum() & print() are functions

• # is used to place comments

• <- is the assignment operator

Class :

Every object is defined with any one of the following Class

Logical: logical values have only 2 outputs- TRUE or FALSE, example – TRUE, FALSE

a <- TRUE
	class(a)
	[1] "logical"

Numeric : numeric values can be decimal numbers as well as integers, example – 12.3, 5, 999

b <- 13.5
	class(b)
	[1] "numeric"

	c <- 23
	class(c)
	[1] "numeric"

Integer : placing ‘L’ at the end would store the value as integer, example – 2L, 34L, 0L

d <- 2L
	class(d)
	[1] "integer"

Classes are also called as Data Types of an object

Complex: a complex value in R is defined via the pure imaginary value ‘i’, example - 4 + 3i

x <- 4+3i
	class(x)
	[1] "complex"

Character: text is stored as character type in R, example - “Hello World”, “TRUE”, ‘53.2’, “a”

x <- "Hello World"
	class(x)
	[1] "character"

Raw: the raw type is intended to hold raw bytes, example - “Bookofnetwork” is stored as 51 6f 67 6e 70 80 75 55 44 39 87 97 93

x <- "Bookofnetwork"
	x <- charToRaw(x)
	class(x)
	[1] "raw"
	print(x)
[1] 51 6f 67 6e 70 80 75 55 44 39 87 97 933