Hi I do not see any problem with your code. *apply functions are also hidden cycles and there shall not be substantial improvement in speed.
Why you do not want to use for cycle? Petr > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Simone Gabbriellini > Sent: Friday, February 01, 2013 12:54 PM > To: r-help@r-project.org > Subject: [R] how to > > Dear List, > > I have a list of lists and on each list I want to apply a function from > the igraph package, graph.knn. I need to calculate graph.knn for each > list on a graph g, then retrieve one of the result called $knn and > calculate its mean. The non-R style code looks like this: > > for(i in listOfLists){ > print(mean(graph.knn(g, i)$knn)) > } > > Is there any way to convert this in a one-liner? I have tried to figure > it out with lapply() or mapply() but with no success. > > Thank you in advance for your help. > > Simone > > -- > Simone Gabbriellini, PhD > > PostDoc@DISI, University of Bologna > mobile: +39 340 39 75 626 > email: simone.gabbriell...@unibo.it > home: www.digitaldust.it > > DigitalBrains srl > Amministratore > mobile: +39 340 39 75 626 > email: simone.gabbriell...@digitalbrains.it > home: www.digitalbrains.it > > ______________________________________________ > 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.
