My solution was based on using vectors (which were your original example), now you are using data frames. The actual result is NA, then you just print content again (which my code never modified) so you are going to see the full content data frame.
Try: content[na.omit(pmatch(searchset$signatures, content$urls)),] then look at all the pieces (starting from inside out) to see what is happening at each step to understand what is going on. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: Ralf B [mailto:ralf.bie...@gmail.com] > Sent: Tuesday, July 13, 2010 11:57 AM > To: Greg Snow > Cc: r-help@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.s...@imail.org> > wrote: > > content[na.omit(pmatch(searchset, content,,TRUE))] > > > > -- > > Gregory (Greg) L. Snow Ph.D. > > Statistical Data Center > > Intermountain Healthcare > > greg.s...@imail.org > > 801.408.8111 > > > > > >> -----Original Message----- > >> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > >> project.org] On Behalf Of Ralf B > >> Sent: Tuesday, July 13, 2010 5:47 AM > >> To: r-help@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@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. > > ______________________________________________ R-help@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.
