How to Delete Multiple Columns in R DataFrame?

In this article, we will discuss how to delete multiple columns in R Programming Language. We can delete multiple columns in the R dataframe by assigning null values through the list() function.

Syntax:

data[ , c(‘column_name1’, ‘column_name2’,………..,’column_nam en)] <- list(NULL)

where, data is the input dataframe

Example: R program to create a dataframe and assign columns to null.

R

# dataframe
data = data.frame(column1=c(70, 76, 89),
                  column2=c(90, 79, 100),
                  column3=c(23, 4, 56),
                  column4=c(23, 45, 21))


# display
print(data)

# delete three columns
print(data[, c('column1', 'column2', 'column3')] < - list(NULL))

Output:

We can also delete columns using index of columns.

Syntax:

dataframe[ , column_index_start:column_index_end] <- list(NULL)

Where , 

• dataframe is the input dataframe
• column_index are the column positions

Example:

R

# dataframe
data = data.frame(column1=c(70, 76, 89),
                  column2=c(90, 79, 100),
                  column3=c(23, 4, 56),
                  column4=c(23, 45, 21))


# display
print(data)

# delete three columns
print(data[, 1:3] < - list(NULL))

Output: