Append New Variable to First Index Position of Data Frame in R (Example Code)
In this R programming tutorial you’ll learn how to add a new column to the front (not the end) of a data frame.
Creation of Example Data
data(iris) # Loading example data frame 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 frame 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: Appending a New Column at the Front of a Data Frame Using the cbind() Function
iris_updated <- cbind(col_new = 1:nrow(iris), # Adding column iris) head(iris_updated) # col_new Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 1 5.1 3.5 1.4 0.2 setosa # 2 2 4.9 3.0 1.4 0.2 setosa # 3 3 4.7 3.2 1.3 0.2 setosa # 4 4 4.6 3.1 1.5 0.2 setosa # 5 5 5.0 3.6 1.4 0.2 setosa # 6 6 5.4 3.9 1.7 0.4 setosa |
iris_updated <- cbind(col_new = 1:nrow(iris), # Adding column iris) head(iris_updated) # col_new Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 1 5.1 3.5 1.4 0.2 setosa # 2 2 4.9 3.0 1.4 0.2 setosa # 3 3 4.7 3.2 1.3 0.2 setosa # 4 4 4.6 3.1 1.5 0.2 setosa # 5 5 5.0 3.6 1.4 0.2 setosa # 6 6 5.4 3.9 1.7 0.4 setosa
Further Resources & Related Tutorials
Please find some related R programming language tutorials in the following list.
- Add Lagged Column by Group to Data Frame Using dplyr
- Create New Data Frame Column Using Other Variables in R
- Add New Data Frame Rows for Missing Dates
- How to Add a New Variable Between 2 Data Frame Columns
- Replicate Column with & Add to Data Frame with New Name
- Add New Column to Data Frame in for-Loop