[R] what is the "NOT IN" operator

[David Winsemius]

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
>> BSES Limited  |  ABN 29 103 760 005  |  PO Box 86  |  50 Meiers  
>> Road  |  Indooroopilly Q 4068 Australia
>> P:  +61 7 3331 3304  |  M: +61 408 656 452  |  F: +61 7 3871 0383   
>> |  E: edeomano at bses.com.au<mailto:edeomano at bses.com.au>  |  W:  
>> bses.com.au
>>
>>
>> -------------------- Internet e-Mail Disclaimer --------------------
>>
>> PRIVILEGED - PRIVATE AND CONFIDENTIAL: This email and any files  
>> transmitted with it are intended solely for the use of the  
>> addressee(s) and may contain information, which is confidential or  
>> privileged. If you are not the intended recipient, be aware that  
>> any disclosure, copying, distribution, or use of the contents of  
>> this information is prohibited. In such case, you should destroy  
>> this message and kindly notify the sender by reply e-mail. The  
>> views and opinions expressed in this e-mail are those of the sender  
>> and do not necessarily reflect the views of the company.
>>
>> VIRUSES:  Email transmission cannot be guaranteed to be secure or  
>> error free, as information may be intercepted, corrupted, lost,  
>> destroyed, arrive late or incomplete or contain viruses. This email  
>> and any files attached to it have been checked with virus detection  
>> software before transmission. You should nonetheless carry out your  
>> own virus check before opening any attachment. BSES Limited does  
>> not represent or warrant that files attached to this email are free  
>> from computer viruses or other defects and accepts no liability for  
>> any loss or damage that may be caused by software viruses
>>
>> 	[[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at 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.
>
> ______________________________________________
> R-help at 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.

David Winsemius, MD
West Hartford, CT