Extract Variable Names from Data Frame in R (Example Code)

In this article, I’ll illustrate how to extract the column names from a data frame in the R programming language.

Creation of Example Data

data(iris)                         # Loading 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: Applying colnames() Function to Get Column Names of Data Frame

colnames(iris)                     # Return column names
# [1] "Sepal.Length" "Sepal.Width"  "Petal.Length" "Petal.Width"  "Species"

Related Tutorials & Further Resources

You may read the other articles on this website. A selection of tutorials that are related to the extraction of the variable names of a data frame can be found below:

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