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 |
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" |
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: