R Tip: Use qc() For Fast Legible Quoting

February 17, 2018
By

[This article was first published on R – Win-Vector Blog, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

Here is an R tip. Need to quote a lot of names at once? Use qc().

This is particularly useful in selecting columns from data.frames:

library("wrapr")  # get qc() definition

head(mtcars[, qc(mpg, cyl, wt)])

#                    mpg cyl    wt
# Mazda RX4         21.0   6 2.620
# Mazda RX4 Wag     21.0   6 2.875
# Datsun 710        22.8   4 2.320
# Hornet 4 Drive    21.4   6 3.215
# Hornet Sportabout 18.7   8 3.440
# Valiant           18.1   6 3.460

Or even to install many packages at once:

install.packages(qc(vtreat, cdata, WVPlots))
# shorter than the alternative:
#  install.packages(c("vtreat", "cdata", "WVPlots"))

To leave a comment for the author, please follow the link and comment on their blog: R – Win-Vector Blog.

R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.



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)