How to Delete Several Variables from data.table in R Programming (Example Code)

This article shows how to delete several data.table variables in the R programming language.

Preparing the Example

install.packages("data.table")       # Install & load data.table package
library("data.table")
data(iris)                         # Load data
setDT(iris)                        # Convert iris to data.table
head(iris)                         # First rows
#    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: Delete Multiple data.table Columns

iris[ ,`:=`(Sepal.Width = NULL,    # Remove columns
            Petal.Width = NULL,
            Species = NULL)]
head(iris)                         # First rows of new data.table
#    Sepal.Length Petal.Length
# 1:          5.1          1.4
# 2:          4.9          1.4
# 3:          4.7          1.3
# 4:          4.6          1.5
# 5:          5.0          1.4
# 6:          5.4          1.7

Leave a Reply

Your email address will not be published. Required fields are marked *

Fill out this field
Fill out this field
Please enter a valid email address.
You need to agree with the terms to proceed

Menu
Top