it works!
thank you so much
Mario
On Fri, Jan 14, 2011 at 1:29 PM, Henrique Dallazuanna <www...@gmail.com>wrote:
> Try this:
>
> !list %in% c("aa", "bb")
>
> On Fri, Jan 14, 2011 at 10:19 AM, A M Lavezzi <lave...@unipa.it> wrote:
>
>> Hi everybody,
>>
>> I have the following problem. I have a vector containing character
>> elements,
>> such as:
>>
>> list = c("aa","bb","cc","dd","ee")
>>
>> I want to create an index which identifies the elements that are different
>> from, e.g. "aa" and "bb".
>>
>> When I do the following:
>>
>> jj = list!="aa" & list!="bb"
>>
>> > jj
>> [1] FALSE FALSE TRUE TRUE TRUE
>>
>> I do the job. But I wonder whether there is a shorter command to compare
>> the
>> elements of 'list' directly to both "aa" and "bb", avoiding the repetition
>> of '& list!=...' and get a result such as jj
>>
>> thanks!
>>
>>
>>
>>
>> --
>> Andrea Mario Lavezzi
>> currently visiting the University of Oxford, Nuffield College
>>
>> Dipartimento Studi su Politica, Diritto e SocietÄ
>>
>> Piazza Bologni 8
>> 90134 Palermo, Italy
>> tel. ++39 091 23892208
>> fax ++39 091 6112023
>> skype: lavezzimario
>> email: lave...@unipa.it
>> web: http://www.unipa.it/~lavezzi <http://www.unipa.it/%7Elavezzi>
>>
>> [[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.
>>
>>
>
>
> --
> Henrique Dallazuanna
> Curitiba-Paraná-Brasil
> 25° 25' 40" S 49° 16' 22" O
>
--
Andrea Mario Lavezzi
currently visiting the University of Oxford, Nuffield College
Dipartimento Studi su Politica, Diritto e SocietÃ
Piazza Bologni 8
90134 Palermo, Italy
tel. ++39 091 23892208
fax ++39 091 6112023
skype: lavezzimario
email: lave...@unipa.it
web: http://www.unipa.it/~lavezzi
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