How to Add a Row to a Dataframe in R?

In this tutorial, we will look at how to add a row to an existing dataframe in R with the help of some examples.

How do I add a row to a dataframe in R?

You can use the rbind() function to add an additional row to an existing dataframe in R. Pass the existing dataframe and the dataframe resulting from the new row as arguments.

The following is the syntax –

rbind(existing_dataframe, data.frame(column_name=column_data))

It returns a new dataframe with the passed row appended to the existing dataframe rows.

Examples

Let’s now look at some examples of using the above syntax in action.

First, we will create our existing dataframe.

# create a dataframe
students_df = data.frame(
  "Name"= c("Ben", "Quinton", "Virat", "Smriti", "Jos"),
  "Age"= c(23, 27, 24, 21, 26)
)
# display the dataframe
print(students_df)

Output:

     Name Age
1     Ben  23
2 Quinton  27
3   Virat  24
4  Smriti  21
5     Jos  26

The above dataframe contains the name and age information of some students in a university in the columns “Name” and “Age” respectively.

Add a single row to an existing dataframe in R

Let’s say you want to add one more row to the above dataframe—for example, a row with information on a student with the name “Steve” and age 27.

Here, we will use the rbind() function add an additional row to the dataframe created above.

# add a row to students_df
students_df = rbind(students_df, data.frame("Name"="Steve", "Age"=27))
# display the dataframe
print(students_df)

Output:

     Name Age
1     Ben  23
2 Quinton  27
3   Virat  24
4  Smriti  21
5     Jos  26
6   Steve  27

You can see that the dataframe students_df now has an additional row with information on the student, “Steve”.

Append multiple rows to an existing dataframe

You can similarly use the rbind() function to append more than one row to an existing dataframe. For example, let’s add rows for students “Umran” aged 18 and “Bumrah” aged 21 to our above dataframe.

# add multile rows to students_df
students_df = rbind(students_df, data.frame("Name"=c("Umran", "Bumrah"), "Age"=c(18, 21)))
# display the dataframe
print(students_df)

Output:

     Name Age
1     Ben  23
2 Quinton  27
3   Virat  24
4  Smriti  21
5     Jos  26
6   Steve  27
7   Umran  18
8  Bumrah  21

You can see that the resulting dataframe has two new rows. Essentially, the rbind() function is appending a dataframe resulting from new rows to our existing dataframe.

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