Extracting Subset of data.table Variables in R (Example Code)

In this R programming tutorial you’ll learn how to retain particular columns of a data.table.

Preparing the Example

install.packages("data.table")                 # Install & load data.table
library("data.table")
my_dt <- data.table(matrix(1:20, ncol = 5))    # Constructing data table in R
my_dt                                          # Showing data table in RStudio console
#    V1 V2 V3 V4 V5
# 1:  1  5  9 13 17
# 2:  2  6 10 14 18
# 3:  3  7 11 15 19
# 4:  4  8 12 16 20

Example: Extract Data Table Variables

my_dt_updated <- my_dt[ ,                      # Deleting particular columns
                        ! c("V1", "V3", "V4"),
                        with = FALSE]
my_dt_updated                                  # Showing new data table
#    V2 V5
# 1:  5 17
# 2:  6 18
# 3:  7 19
# 4:  8 20

Further Resources & Related Tutorials

Below, you can find some further resources that are similar to the topic of this page.

Leave a Reply

Your email address will not be published.

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