How to Add an Empty Column to DataFrame in R?

In this article, we will discuss how to add an empty column to the dataframe in R Programming Language.

Add One Empty Column to dataframe

Here we are going to add an empty column to the dataframe by assigning column values as NA.

Syntax:

dataframe[ , 'column_name'] = NA

where,

• dataframe  is the input dataframe
• column_name is the new column name

Example: R program to create a dataframe with 3 columns and add an empty column

# create a dataframe with 4 rows and 3 columns
data = data.frame(marks1=c('90', '78', '89', '76'),
                  marks2=c('92', '68', '78', '96'),
                  marks3=c('90', '78', '89', '76'))

# add an empty column named empty_column
data[, 'empty_column'] = NA

# display
print(data)

Output:

Add Multiple Empty Columns to dataframe

We can add multiple columns with empty values in dataframe by passing column names in c() function

Syntax:

data[,c('column_name1',column_name2',............,'column_name n')]

Example: R program to add 4 empty columns

# create a dataframe with 4 rows and 3 columns
data = data.frame(marks1=c('90', '78', '89', '76'),
                  marks2=c('92', '68', '78', '96'), 
                  marks3=c('90', '78', '89', '76'))

# add 4 empty columns
data[, c('empty1', 'empty2', 'empty3', 'empty4')] = NA

# display
print(data)

Output: