character position
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
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