R Shift Variable to First Index Position of Data Frame (Example Code)
In this R post you’ll learn how to shift a variable to the beginning of a data frame.
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 |
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: Move Variable to First Position of Data Frame Using names() Function
iris_updated <- iris[ , c("Species", names(iris)[names(iris) != "Species"])] # Reorder data head(iris_updated) # Show new ordering # Species Sepal.Length Sepal.Width Petal.Length Petal.Width # 1 setosa 5.1 3.5 1.4 0.2 # 2 setosa 4.9 3.0 1.4 0.2 # 3 setosa 4.7 3.2 1.3 0.2 # 4 setosa 4.6 3.1 1.5 0.2 # 5 setosa 5.0 3.6 1.4 0.2 # 6 setosa 5.4 3.9 1.7 0.4 |
iris_updated <- iris[ , c("Species", names(iris)[names(iris) != "Species"])] # Reorder data head(iris_updated) # Show new ordering # Species Sepal.Length Sepal.Width Petal.Length Petal.Width # 1 setosa 5.1 3.5 1.4 0.2 # 2 setosa 4.9 3.0 1.4 0.2 # 3 setosa 4.7 3.2 1.3 0.2 # 4 setosa 4.6 3.1 1.5 0.2 # 5 setosa 5.0 3.6 1.4 0.2 # 6 setosa 5.4 3.9 1.7 0.4
Further Resources
Please find some related R tutorials on topics such as extracting data, numeric values, groups, and data conversion below.