Any logical value can be negatively compared using !
does:
subset(dat, !(dat$ID %in% someID))
provide what you need?
--------------------------------------
Jonathan P. Daily
Technician - USGS Leetown Science Center
11649 Leetown Road
Kearneysville WV, 25430
(304) 724-4480
"Is the room still a room when its empty? Does the room,
the thing itself have purpose? Or do we, what's the word... imbue it."
- Jubal Early, Firefly
From:
[email protected]
To:
[email protected]
Date:
11/05/2010 02:21 PM
Subject:
[R] subsets, %in%
Sent by:
[email protected]
Hi,
I have a question about %in% and subsettin data frames.
Say I need to keep ID 1,2,4,5, 10 from the data frame dat. I can do:
dat <- data.frame(ID = 1:10, var = 1:10)
someID <- c(1,2,4,5,10)
subset(dat, dat$ID %in% someID)
Is there a quick way to do the opposite, ie to do a subset that contains
all ID but someID? Something like %not in%, which would *remove* lines
with
ID in someID?
I am asking because I need this in a more complex example where there are
multiple lines with the same ID (data in long format) and I need to remove
selected ID.
thanks,
MP
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______________________________________________
[email protected] mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
