Re: [Rd] Word boundaries and gregexpr in R 2.2.1 (PR#8547)

From: Robert Gentleman <rgentlem_at_fhcrc.org>
Date: Wed 01 Feb 2006 - 14:16:35 GMT

Should be patched in R-devel, will be available shortly

stgries@linguistics.ucsb.edu wrote:
> Full_Name: Stefan Th. Gries
> Version: 2.2.1
> OS: Windows XP (Home and Professional)
> Submission from: (NULL) (68.6.34.104)
>
>
> The problem is this: I have a vector of two character strings.
>
>

>>text<-c("This is a first example sentence.", "And this is a second example    

>
> sentence.")
>
> If I now look for word boundaries with regexpr, this is what I get:
>
>>regexpr("\\b", text, perl=TRUE)

>
> [1] 1 1
> attr(,"match.length")
> [1] 0 0
>
> So far, so good. But with gregexpr I get:
>
>
>>gregexpr("\\b", text, perl=TRUE)

>
> Error: cannot allocate vector of size 524288 Kb
> In addition: Warning messages:
> 1: Reached total allocation of 1015Mb: see help(memory.size)
> 2: Reached total allocation of 1015Mb: see help(memory.size)
>
> Why don't I get the locations and extensions of all word boundaries?
>
> I am using R 2.2.1 on a machine running Windows XP:
>
>>R.version

>
> _
> platform i386-pc-mingw32
> arch i386
> os mingw32
> system i386, mingw32
> status
> major 2
> minor 2.1
> year 2005
> month 12
> day 20
> svn rev 36812
> language R
>
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> https://stat.ethz.ch/mailman/listinfo/r-devel
>
-- 
Robert Gentleman, PhD
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M2-B876
PO Box 19024
Seattle, Washington 98109-1024
206-667-7700
rgentlem@fhcrc.org

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Received on Thu Feb 02 01:25:20 2006

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