How to Remove a Column by name and index using Dplyr Package in R
Last Updated :
21 Jul, 2021
In this article, we are going to remove columns by name and index in the R programming language using dplyr package.
Dataset in use:
Remove a column by using column name
We can remove a column with select() method by its column name.
Syntax:
select(dataframe,-column_name)
Where, dataframe is the input dataframe and column_name is the name of the column to be removed.
Example: R program to remove a column
R
# load the library
library(dplyr)
# create dataframe with 3 columns
# id,name and address
data1=data.frame(id=c(1,2,3,4,5,6,7,1,4,2),
name=c('sravan','ojaswi','bobby',
'gnanesh','rohith','pinkey',
'dhanush','sravan','gnanesh',
'ojaswi'),
address=c('hyd','hyd','ponnur','tenali',
'vijayawada','vijayawada','guntur',
'hyd','tenali','hyd'))
# remove name column
print(select(data1,-name))
# remove id column
print(select(data1,-id))
Output:
Remove multiple columns by using column name
We can remove a column with select() method by its column name
Syntax:
select(dataframe,-c(column_name1,column_name2,.,column_name n)
Where, dataframe is the input dataframe and -c(column_names) is the collection of names of the column to be removed.
Example: R program to remove multiple columns
R
# load the library
library(dplyr)
# create dataframe with 3 columns
# id,name and address
data1=data.frame(id=c(1,2,3,4,5,6,7,1,4,2),
name=c('sravan','ojaswi','bobby',
'gnanesh','rohith','pinkey',
'dhanush','sravan','gnanesh',
'ojaswi'),
address=c('hyd','hyd','ponnur','tenali',
'vijayawada','vijayawada','guntur',
'hyd','tenali','hyd'))
# remove name and id column
print(select(data1,-c(id,name)))
# remove name and address column
print(select(data1,-c(address,name)))
# remove all column
print(select(data1,-c(address,name,id)))
Output:
Remove a column by using column index
We can remove a column with select() method by its column index/position. Index starts with 1.
Syntax:
select(dataframe,-column_index)
Where, dataframe is the input dataframe and column_index is the position of the column to be removed.
Example: R program to remove particular column
R
# load the library
library(dplyr)
# create dataframe with 3 columns
# id,name and address
data1=data.frame(id=c(1,2,3,4,5,6,7,1,4,2),
name=c('sravan','ojaswi','bobby',
'gnanesh','rohith','pinkey',
'dhanush','sravan','gnanesh',
'ojaswi'),
address=c('hyd','hyd','ponnur','tenali',
'vijayawada','vijayawada','guntur',
'hyd','tenali','hyd'))
# remove name column by its position
print(select(data1,-2))
# remove address column by its position
print(select(data1,-3))
Output:
Remove multiple columns by using column index
We can remove a column with select() method by its column index/position. Index starts with 1.
Syntax:
select(dataframe,-c(column_index1,column_index2,.,column_index n)
Where, dataframe is the input dataframe and c(column_indexes) is the position of the columns to be removed.
Example: R program to remove multiple columns by position
R
# load the library
library(dplyr)
# create dataframe with 3 columns
# id,name and address
data1=data.frame(id=c(1,2,3,4,5,6,7,1,4,2),
name=c('sravan','ojaswi','bobby',
'gnanesh','rohith','pinkey',
'dhanush','sravan','gnanesh',
'ojaswi'),
address=c('hyd','hyd','ponnur','tenali',
'vijayawada','vijayawada','guntur',
'hyd','tenali','hyd'))
# remove name and id columns by
# its position
print(select(data1,-c(1,2)))
Output:
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