On Oct 6, 2010, at 9:03 PM, Christian Raschke wrote:
Put the "!" in front of the whole expression, not just the %in%
function. I.e.
sub <- mydata[!(mydata$group %in% c("A", "B", "E", "G")),]
You can also look at the match help page where %in% and its negation,
%w/o% , are illustrated.
--
David.
Christian
On Thu, 2010-10-07 at 09:17 +1000, Emily Deomano wrote:
Good day,
I need to subset a data by removing several rows. I know the %in%
operator, i.e.
sub <- mydata[group %in% c("A","B","E","G"), ]
What I need is the opposite, that is remove rows and/or columns.
What is the operator for "NOT IN"? I tried (i)! %in% and (ii) ^%in
% and both resulted in a "could not find function" error.
Kind Regards
Emily Deomano | Biometrician
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