R Numbers
Numbers
There are three number types in R:
numericintegercomplex
Variables of number types are created when you assign a value to them:
Example
x <- 10.5 #
numeric
y <- 10L # integer
z <- 1i # complex
Numeric
A numeric data type is the most common type
in R, and contains any number with or without a decimal, like: 10.5, 55, 787:
Example
x <- 10.5
y <- 55
# Print values of x and y
x
y
#
Print the class name of x and y
class(x)
class(y)
Try it Yourself »
Integer
Integers are numeric data without decimals. This is used when you are certain
that you will never create a variable that should contain decimals. To create an integer
variable,
you must use the letter L after the integer value:
Example
x <- 1000L
y <- 55L
# Print values of x and y
x
y
# Print the class name of x and y
class(x)
class(y)
Try it Yourself »
Complex
A complex number is written with an "i" as the imaginary part:
Example
x <- 3+5i
y <- 5i
# Print values of x and y
x
y
# Print the class name of x and y
class(x)
class(y)
Try it Yourself »
Type Conversion
You can convert from one type to another with the following functions:
as.numeric()as.integer()as.complex()
Example
x <- 1L # integer
y <- 2 # numeric
# convert from integer to
numeric:
a <- as.numeric(x)
# convert from numeric to integer:
b
<- as.integer(y)
# print values of x and y
x
y
# print
the class name of a and b
class(a)
class(b)
Try it Yourself »
