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

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

Further Resources & Related Tutorials

Please find some related R programming language tutorials in the following list.

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