R help - Oct 2009 - Regex matching that gives byte offset?

Hi,

Is there any way of doing 'grep' ore something like it on the content of
a
text file and extract the byte positioning of the match in the file? I'm 
facing the need to access rather largish (>600MB) XML files and would like 
to be able to index them ...

Thanks for any help or flogging,

Joh

Do you mean like regexpr() (on the same help page)?

Depending on your locale, you might actually prefer the character 
offset: if you want to match in a MBCS and have byte offsets you will 
need to work a bit harder if useBytes=TRUE is not sufficient for you.

On Wed, 28 Oct 2009, Johannes Graumann wrote:
> Hi,
>
> Is there any way of doing 'grep' ore something like it on the
content of a
> text file and extract the byte positioning of the match in the file?
I'm
> facing the need to access rather largish (>600MB) XML files and would
like
> to be able to index them ...
>
> Thanks for any help or flogging,
>
> Joh
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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