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. 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 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.
