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Check if a Factor is an Ordered Factor in R Programming – is.ordered() Function

  • Last Updated : 08 Nov, 2021

is.ordered() function in R Programming Language is used to check if the passed factor is an ordered factor.

Syntax: is.ordered(factor)

Parameters: 

  • factor: Factor to be checked

is.ordered() Function in R Programming Example

Example 1: Demonestration of R – is.ordered() Function 

R




# Creating a vector
x<-c("female", "male", "male", "female")
 
# Converting vector into factor
gender <- factor(x)
 
# Using is.ordered() Function
# to check if a factor is ordered
is.ordered(gender)

Output: 



[1] FALSE

Example 2: 

R




# creating vector size
size = c("small", "large", "large", "small"
         "medium", "large", "medium", "medium")  
sizes <- ordered(c("small", "large", "large",
                   "small", "medium"))
   
# ordering the levels
sizes <- ordered(sizes, levels = c("small", "medium",
                                   "large"))    
 
# Checking if the factor is ordered
# using is.ordered() function
is.ordered(sizes)

Output: 

[1] TRUE



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