character position

-----Original Message-----
From: Henrique Dallazuanna [mailto:wwwhsd at gmail.com]
Sent: quinta-feira, 18 de Setembro de 2008 12:14
To: Paulo Cardoso
Cc: jim holtman; r
Subject: Re: [R] character position

Try:

sub(".*FILE (\\w+)|\\.*", "\\1", x, perl=TRUE)

On Thu, Sep 18, 2008 at 7:39 AM, Paulo Cardoso <pecardoso at netcabo.pt>
wrote:

Perfect but when one wants to get something different, like

x <- 'INPUT FILE record.dat'
sub(".*FILE (\\w+).*", "\\1", x, perl=TRUE)

will return 'record' and not 'record.dat'

the [:punct:] is not retained.

Paulo

-----Original Message-----
From: jim holtman [mailto:jholtman at gmail.com]
Sent: quinta-feira, 18 de Setembro de 2008 9:58
To: Paulo Cardoso
Cc: r
Subject: Re: [R] character position

If it always occurs after 'are', this will work:

x <-  'There are 20 species in this grid'
y <- sub(".*are (\\d+).*", "\\1", x, perl=TRUE)
y

[1] "20"

On Thu, Sep 18, 2008 at 4:51 AM, Paulo Cardoso

<pecardoso at netcabo.pt>

wrote:

Hi,

I'm not being able to capture a position of a 'string' in a

character

string.

In this example: 'There are 20 species in this grid'

I would like to capture the string (number) after 'are' and

before

'species'. Consider they do not change. I wouldn't like to use

substr

because stop position may change.

Thanks

Paulo

project.org/posting-

guide.html

code.

--
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?
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Henrique Dallazuanna
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25? 25' 40" S 49? 16' 22" O
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