How to Apply the ordered() Function in R (Example Code)

In this R tutorial you’ll learn how to apply the ordered() function.

Creation of Example Data

data(iris)                               # Example data
head(iris)
#   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 1          5.1         3.5          1.4         0.2  setosa
# 2          4.9         3.0          1.4         0.2  setosa
# 3          4.7         3.2          1.3         0.2  setosa
# 4          4.6         3.1          1.5         0.2  setosa
# 5          5.0         3.6          1.4         0.2  setosa
# 6          5.4         3.9          1.7         0.4  setosa

Example: Turn Data Frame Column into Ordered Factor Using ordered() Function

class(iris$Species)                      # Check class of variable
# [1] "factor"
iris$Species <- ordered(iris$Species)    # Using ordered function
class(iris$Species)                      # Check class of updated variable
# [1] "ordered" "factor"

Further Resources & Related Tutorials

You may have a look at the following list of R programming tutorials. They discuss topics such as numeric values, character strings, data conversion, and factors:

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