[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.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
coalesce is a classic useful SQL operator that picks the first non-NULL value in a sequence of values.
We thought we would share a nice version of it for picking non-NA R with convenient operator infix notation wrapr::coalesce(). Here is a short example of it in action:
library("wrapr")
NA %?% 0
# [1] 0
A more substantial application is the following.
library("wrapr")
d <- wrapr::build_frame(
"more_precise_sensor", "cheaper_back_up_sensor" |
0.31 , 0.25 |
0.41 , 0.5 |
NA_real_ , 0.5 )
print(d)
# more_precise_sensor cheaper_back_up_sensor
# 1 0.31 0.25
# 2 0.41 0.50
# 3 NA 0.50
d$measurement <-
d$more_precise_sensor %?% d$cheaper_back_up_sensor
print(d)
# more_precise_sensor cheaper_back_up_sensor measurement
# 1 0.31 0.25 0.31
# 2 0.41 0.50 0.41
# 3 NA 0.50 0.50
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.