I apologize for the noise. I did not read the original question carefully enough.
Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 > -----Original Message----- > From: Jeff Newmiller [mailto:jdnew...@dcn.davis.ca.us] > Sent: Tuesday, February 12, 2013 11:37 AM > To: Nordlund, Dan (DSHS/RDA); r-help@r-project.org > Subject: Re: [R] Is there a neat R trick for this? > > but that doesn't maintain the sequence of the original data. > ----------------------------------------------------------------------- > ---- > Jeff Newmiller The ..... ..... Go > Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live > Go... > Live: OO#.. Dead: OO#.. > Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. > rocks...1k > ----------------------------------------------------------------------- > ---- > Sent from my phone. Please excuse my brevity. > > "Nordlund, Dan (DSHS/RDA)" <nord...@dshs.wa.gov> wrote: > > >Another option is > > > >which(y %in% x) > > > > > >Dan > > > >Daniel J. Nordlund > >Washington State Department of Social and Health Services > >Planning, Performance, and Accountability > >Research and Data Analysis Division > >Olympia, WA 98504-5204 > > > >> -----Original Message----- > >> From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > >> project.org] On Behalf Of Pascal Oettli > >> Sent: Tuesday, February 12, 2013 2:21 AM > >> To: Robert Latest > >> Cc: r-help@r-project.org > >> Subject: Re: [R] Is there a neat R trick for this? > >> > >> Hello, > >> > >> ?match > >> > >> > x <- c(4,5,6) > >> > y <- c(10,1,5,12,4,13,14) > >> > match(x,y) > >> [1] 5 3 NA > >> > >> Hope this helps, > >> Pascal > >> > >> > >> Le 12/02/2013 19:09, Robert Latest a écrit : > >> > Hello all, > >> > > >> > given two vectors X and Y I'd like to receive a vector Z which > >> > contains, for each element of X, the index of the corresponding > >> > element in Y (or NA if that element isn't in Y). > >> > > >> > Example: > >> > > >> > x <- c(4,5,6) > >> > y <- c(10,1,5,12,4,13,14) > >> > > >> > z <- findIndexIn(x, y) > >> > z > >> > [1] 5 3 NA > >> > > >> > 1st element of z is 5, because the 1st element of x is at the 5th > >> position in y > >> > 2nd element of z is 3, because the 2nd element of x is at the 3rd > >> position in y > >> > 3rd element of z is NA, because the 3rd element of x is not in y > >> > > >> > Of course I can write the function findIndexIn() using a for loop, > >> but > >> > in 80% of cases when I felt the urge to use "for" in R it turned > >out > >> > that there was already some builtin operator or function that did > >the > >> > trick. > >> > > >> > Suggestions, anyone? > >> > Thanks, > >> > > >> > robert > >> > > >> > ______________________________________________ > >> > 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. > >______________________________________________ > >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.
