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:
MP.Sylvestre@gmail.com
To:
r-help@r-project.org
Date:
11/05/2010 02:21 PM
Subject:
[R] subsets, %in%
Sent by:
r-help-bounces@r-project.org



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

                 [[alternative HTML version deleted]]

______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide 
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.



	[[alternative HTML version deleted]]

