works nice : lapply( Mystruct, "[", "xy") # should return a list with "xy" elements
Thanks --- On Wed, 11/17/10, David Winsemius <dwinsem...@comcast.net> wrote: From: David Winsemius <dwinsem...@comcast.net> Subject: Re: [R] Give me all operator To: "Alaios" <ala...@yahoo.com> Cc: r-help@r-project.org, ivan.calan...@uni-hamburg.de Date: Wednesday, November 17, 2010, 4:07 PM On Nov 17, 2010, at 9:26 AM, Alaios wrote: > It seems that I am confusing something: > > List of 50 > $ :List of 2 > ..$ CRmap: logi [1:100, 1:100] NA NA NA NA NA NA ... > ..$ xy : num [1:2] 21 11 > $ :List of 2 > ..$ CRmap: logi [1:100, 1:100] NA NA NA NA NA NA ... > ..$ xy : num [1:2] 80 68 lapply( Mystruct, "[", "xy") # should return a list with "xy" elements > > > Le 11/17/2010 14:56, Alaios a écrit : >> Thanks a lot for your helpful answer. >> In my case now I have implemented some "struct" with the following >> structure >> Mystruct.Map >> Mystruct.xy >> >> If I do Mystruct[2].$xy I get correctly the xy values of the second item. It shouldn't. That extra period should mess things up. There is no ".$" operator. --David. >> >> I want now to print all the $xy fields of the Mystruct[[]] >> I tried >> Mystruct[data.frame(a=1:5)]]$xy which returns the following message: >> >> invalid subscript type 'list' >> >> >> I would like to thank you again for your support >> Regards >> Alex >> >> --- On *Wed, 11/17/10, Ivan Calandra /<ivan.calan...@uni-hamburg.de>/* >> wrote: >> >> >> From: Ivan Calandra <ivan.calan...@uni-hamburg.de> >> Subject: Re: [R] Give me all operator >> To: r-help@r-project.org >> Date: Wednesday, November 17, 2010, 1:44 PM >> >> Hi Alex, >> >> Is that what you're looking for: >> > df <- data.frame(a=LETTERS[1:5], b=rnorm(5)) >> > df >> a b >> 1 A -0.2401323 >> 2 B -0.9414998 >> 3 C 0.4289836 >> 4 D 1.9802749 >> 5 E -0.6993612 >> > df[3,2] >> [1] 0.4289836 >> > df[3,] >> a b >> 3 C 0.4289836 >> > df[,2] >> [1] -0.2401323 -0.9414998 0.4289836 1.9802749 -0.6993612 >> > df[,2, drop=FALSE] >> b >> 1 -0.2401323 >> 2 -0.9414998 >> 3 0.4289836 >> 4 1.9802749 >> 5 -0.6993612 >> >> See ?"[" for help. In short, in R you use "[", not brackets as in >> matlab >> (from your example, I've never used it). You don't need the ":", you >> just don't write anything in R. >> >> Ivan >> >> Le 11/17/2010 14:34, Alaios a écrit : >> > Hello is there in R any operator that give you all the data of a >> matrix >> > for example in matlab >> > >> > x(2,3) returns the 2ndth row and 3rdth column >> > x(2,:) returns all the columns of the 2nd row. >> > >> > In R now I would like to print all the >> > >> > CRagent[[i]][2] >> > >> > >> > CRagent[[:]][2] doesnot work of course. Other option is to >> make a loop with an index i that spans from 1:last element of >> CRagent[[]] but this is not that optimal. >> > >> > I would like to thank you in aavance for your help >> > Best Regards >> > Alex >> > >> > >> > >> > >> > [[alternative HTML version deleted]] >> > >> > >> > >> > ______________________________________________ >> > R-help@r-project.org </mc/compose?to=r-h...@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. >> >> -- >> Ivan CALANDRA >> PhD Student >> University of Hamburg >> Biozentrum Grindel und Zoologisches Museum >> Abt. Säugetiere >> Martin-Luther-King-Platz 3 >> D-20146 Hamburg, GERMANY >> +49(0)40 42838 6231 >> ivan.calan...@uni-hamburg.de >> </mc/compose?to=ivan.calan...@uni-hamburg.de> >> >> ********** >> http://www.for771.uni-bonn.de >> http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php >> >> ______________________________________________ >> R-help@r-project.org </mc/compose?to=r-h...@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. >> >> > > --Ivan CALANDRA > PhD Student > University of Hamburg > Biozentrum Grindel und Zoologisches Museum > Abt. Säugetiere > Martin-Luther-King-Platz 3 > D-20146 Hamburg, GERMANY > +49(0)40 42838 6231 > ivan.calan...@uni-hamburg.de > > ********** > http://www.for771.uni-bonn.de > http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php > > ______________________________________________ > 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. > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. David Winsemius, MD West Hartford, CT [[alternative HTML version deleted]]
______________________________________________ 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.
