[R] what is the "NOT IN" operator

[Ivan Calandra]

  Hi,

I've just seen yesterday on ?plotmath the operator %notin%.
This could also work I guess.

Ivan

Le 10/7/2010 07:41, Bill.Venables at 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-bounces at r-project.org [r-help-bounces at r-project.org] On Behalf Of Emily Deomano [EDeomano at bses.com.au]
> Sent: 07 October 2010 09:17
> To: r-help at 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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-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

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