Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111
> -----Original Message-----
> From: Ralf B [mailto:ralf.bierig at gmail.com]
> Sent: Tuesday, July 13, 2010 11:57 AM
> To: Greg Snow
> Cc: r-help at r-project.org
> Subject: Re: [R] StartsWith over vector of Strings?
>
> When running the combined code with your suggested line:
>
> content <- data.frame(urls=c(
>
> "http://www.google.com/search?source=ig&hl=en&rlz=&=&q=stuff&aq=f
> &aqi=g10&aql=&oq=&gs_rfai=CrrIS3VU8TJqcMJHuzASm9qyBBgAAAKoEBU_QsmVh",
>
> "http://search.yahoo.com/search;_ylt=Atvki9MVpnxuEcPmXLEWgMqbvZx4
> ?p=stuff&toggle=1&cop=mss&ei=UTF-8&fr=yfp-t-701")
> )
> searchset <- data.frame(signatures=c("http://www.google.com/search"))
> content[na.omit(pmatch(searchset, content$urls))]
> print(content)
>
> I am getting both URLs as results, but in fact, would expect only the
> first URL. Am I overlooking something?
>
>
> Ralf
>
> On Tue, Jul 13, 2010 at 12:03 PM, Greg Snow <Greg.Snow at imail.org>
> wrote:
> > content[na.omit(pmatch(searchset, content,,TRUE))]
> >
> > --
> > Gregory (Greg) L. Snow Ph.D.
> > Statistical Data Center
> > Intermountain Healthcare
> > greg.snow at imail.org
> > 801.408.8111
> >
> >
> >> -----Original Message-----
> >> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> >> project.org] On Behalf Of Ralf B
> >> Sent: Tuesday, July 13, 2010 5:47 AM
> >> To: r-help at r-project.org
> >> Subject: [R] StartsWith over vector of Strings?
> >>
> >> Given vectors of strings of arbitrary length
> >>
> >> content <- c("abc", "def")
> >> searchset <- c("a", "abc", "abcdef", "d", "def", "defghi")
> >>
> >> Is it possible to determine the content String set that matches the
> >> searchset in the sense of 'startswith' ? This would be a vector of
> all
> >> strings in content that start with the string of any of the strings
> in
> >> the searchset. In the little example here, this would be:
> >>
> >> result <- c("abc", "abc", "def", "def")
> >>
> >> Best,
> >> Ralf
> >>
> >> ______________________________________________
> >> R-help at r-project.org mailing list
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide http://www.R-project.org/posting-
> >> guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
> >