How to Remove First Variable of Data Frame in R (Example Code)
This post illustrates how to remove the first column of a data frame in R.
Creation of Exemplifying Data
data(iris) # Example data head(iris) # Display example data # 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) # Example data head(iris) # Display example data # 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: Keep Second to Last Column of Data Frame
iris_new <- iris[ , - 1] # Deleting first variable head(iris_new) # Display new iris data set # Sepal.Width Petal.Length Petal.Width Species # 1 3.5 1.4 0.2 setosa # 2 3.0 1.4 0.2 setosa # 3 3.2 1.3 0.2 setosa # 4 3.1 1.5 0.2 setosa # 5 3.6 1.4 0.2 setosa # 6 3.9 1.7 0.4 setosa |
iris_new <- iris[ , - 1] # Deleting first variable head(iris_new) # Display new iris data set # Sepal.Width Petal.Length Petal.Width Species # 1 3.5 1.4 0.2 setosa # 2 3.0 1.4 0.2 setosa # 3 3.2 1.3 0.2 setosa # 4 3.1 1.5 0.2 setosa # 5 3.6 1.4 0.2 setosa # 6 3.9 1.7 0.4 setosa
Further Resources & Related Tutorials
Please find some related R programming language tutorials below.