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 Società
Piazza Bologni 8
90134 Palermo, Italy
tel. ++39 091 23892208
fax  ++39 091 6112023
skype: lavezzimario
email: lavezzi@unipa.it
web: http://www.unipa.it/~lavezzi

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