[R] a grep/regexpr problem

[Seth Falcon]

Is this what you're looking for?
    > s = "dan001.hin (0): fingerprint={256, 411, 426, 947, 973, 976}"
    > sub(".*{([0-9,\\s]+)}", "\\1", s, perl=T)
    [1] "256, 411, 426, 947, 973, 976"

+ seth

On Fri, Feb 06, 2004 at 01:49:30PM -0500, Rajarshi Guha wrote:
> Hi,
>   I'm trying to parse lines of the form:
> 
> dan001.hin (0): fingerprint={256, 411, 426, 947, 973, 976}
> 
> What I need is the sequence of number between {}. I'm using grep as
> 
> match <- grep("{([0-9,\s]*)}",s,perl=T,value=T)
> 
> where s is a character vector.
> 
> But all I get is the whole string s. I tried using regexpr in an attempt
> to get just the sequence I wanted:
> 
> match <- regexpr("{([0-9,\s]*)}", s , perl=T) 
> 
> but then I get -1 as the return value indicating that there was no
> match. 
> 
> If grep is able to return the matched element (though I dont know why
> the whole string is being returned) why is regexpr failing?
> 
> Finally, could anybody provide a hint as to how I should modify the
> regex to get the sequence between {}. (I've used the same regex in
> Python code to get the sequence and it works fine.)
> 
> Thanks,
> 
> 
> -------------------------------------------------------------------
> Rajarshi Guha <rxg218 at psu.edu> <http://jijo.cjb.net>
> GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE
> -------------------------------------------------------------------
> Entropy requires no maintenance.
> -- Markoff Chaney
> 
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