Defensively install packages in R

February 19, 2018
By

(This article was first published on R – William E. J. Doane PhD, and kindly contributed to R-bloggers)

Often, your R code will rely on having one or more R packages available. A little defensive coding will save users of your code—including future-you—from having to figure out which packages you’re using and then having to manually install them. This lowers the extraneous cognitive load associated with running older or unfamiliar code.

if (!"tidyverse" %in% installed.packages()) install.package("tidyverse")

Or, if you prefer to always use blocks with IF statements:

if (!"tidyverse" %in% installed.packages()) {
  install.package("tidyverse")
}

With a little persistence, you can extend this to dealing with multiple packages:

pkgs <- c("tidyverse", "openxlsx")
install.packages(pkgs[!pkgs %in% installed.packages()])

To leave a comment for the author, please follow the link and comment on their blog: R – William E. J. Doane PhD.

R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...



If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Search R-bloggers

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)