On 07/10/2010 4:10 AM, Ivan Calandra wrote:
Hi,
I've just seen yesterday on ?plotmath the operator %notin%.
This could also work I guess.
No, that's just a way to encode the symbol for "not an element of".
It's not actually an operator that works outside of plotmath (though you
could make it one, as others have shown...)
Duncan Murdoch
Ivan
Le 10/7/2010 07:41, bill.venab...@csiro.au a écrit :
Try !(group %in% C("A", ...))
A slightly cuter way is to define your own operator.
`%ni%`<- Negate(`%in%`)
letters[1:3] %ni% letters[3:5]
[1] TRUE TRUE FALSE
________________________________________
From: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On Behalf Of
Emily Deomano [edeom...@bses.com.au]
Sent: 07 October 2010 09:17
To: r-help@r-project.org
Subject: [R] what is the "NOT IN" operator
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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