Convert an Unordered Factor to an Ordered Factor in R Programming – as.ordered() Function

as.ordered() function in R Language takes an unordered factor as argument and converts it into an ordered factor.

Syntax: as.ordered(factor)

Parameters:
factor: Unordered Factor to be converted

Example 1:

# Creating a vector
x<-c("North", "North", "East", "West")

# Converting vector into factor
Directions <- factor(x)

# Using as.ordered() Function
# to order an unordered factor
as.ordered(Directions)

Output:

[1] North North East  West 
Levels: East < North < West

Example 2:

# creating vector size
size = c("small", "large", "large", "small",
         "medium", "large", "medium", "medium")
sizes <- ordered(c("small", "large", "large",
                   "small", "medium"))

# Using as.ordered() Function
# to order an unordered factor
as.ordered(sizes)

Output:

[1] small  large  large  small  medium
Levels: large < medium < small