[R] regex -> negate a word

[Gabor Grothendieck]

That's an entirely different point from whether regular expressions
can do it as grep -v is just another way to do it without using a regular
expression to specify the entire job.

On Sun, Jan 18, 2009 at 5:02 PM, Rolf Turner <r.turner at auckland.ac.nz> wrote:
>
> On 19/01/2009, at 10:44 AM, Gabor Grothendieck wrote:
>
>> Well, that's why it was only provided when you insisted.  This is
>> not what regexp's are good at.
>>
>> On Sun, Jan 18, 2009 at 4:35 PM, Rau, Roland <Rau at demogr.mpg.de> wrote:
>>>
>>> Thanks! (I have to admit, though, that I expected something simple)
>
> It may not be what regexp's are good at, but the grep command in unix/linux
> does what is required *very* simply via the ``-v'' flag.  I conjecture that
> it would not be difficult to add an argument with similar impact to the
> grep() function in R.
>
>        cheers,
>
>                Rolf Turner
>
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