Re: [R] grep negation

[james . holtman]

?setdiff

e.g.,

> txt <- c("arm","foot","lefroo", "bafoobar")
> i <- grep("foo",txt); i
[1] 2 4
> setdiff(seq(length(txt)),grep("foo",txt))
[1] 1 3
>


Jim
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James Holtman        "What is the problem you are trying to solve?"
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                      Marcus Leinweber                                          
                                                           
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                      ath.ethz.ch                                               
                                                           
                                                                                
                                                           
                                                                                
                                                           
                      06/23/2005 08:59                                          
                                                           
                                                                                
                                                           




hi,

using the example in the grep help:
txt <- c("arm","foot","lefroo", "bafoobar")
i <- grep("foo",txt); i
[1] 2 4

but how can i get the negation (1,3) when looking for 'foo'?

thanks,
m.

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