Try: > names(which(my_list == 'Fred')) [1] "name"
You can break down the two nested calls to figure out what is happening. -Christos > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Srinivas Iyyer > Sent: Wednesday, March 12, 2008 6:53 PM > To: Benilton Carvalho; [EMAIL PROTECTED] > Cc: R Help > Subject: Re: [R] subset list based on logical within element flag > > Hi I have the smililar question. > > I have a list: > my_list <- list(name="Fred", wife="Mary", no.children=3, > child.ages=c(4,7,9)) > > > > my_list > $name > [1] "Fred" > > $wife > [1] "Mary" > > $no.children > [1] 3 > > $child.ages > [1] 4 7 9 > > > Now I want to search "Fred" and get attribute of that value > which is 'name'. > > how do I get it. > > > match(my_list,"Fred") > [1] 1 NA NA NA > > my thinking stops right here... > > list operations in R is too tough to digest and there is not > good documentations. > > Could any one please help. > > thanks > Srini > > > > > > > > --- Benilton Carvalho <[EMAIL PROTECTED]> wrote: > > > gene.pair.tf.lst[sapply(gene.pair.tf.lst, "[[", "sig.cor")] > > > > b > > > > > > On Mar 12, 2008, at 5:24 PM, Mark W Kimpel wrote: > > > > > I have a very long list that I'd like to subset > > based on a logical > > > value > > > within each element. Example below. I'd like to > > get just those list > > > elements for further study whose $sig.cor slot is > > TRUE. In this > > > example, > > > I'd only want element [[2]]. > > > > > > Should be simple, I know. How can I do this? > > Thanks, Mark > > > > > >> gene.pair.tf.lst > > > [[1]] > > > [[1]]$gene.pair > > > [1] "Lgals1:Pxmp2" > > > > > > [[1]]$sig.cor > > > [1] FALSE > > > > > > > > > [[2]] > > > [[2]]$gene.pair > > > [1] "Lgals1:Pxmp2" > > > > > > [[2]]$sig.cor > > > [1] TRUE > > > > > > > > > [[3]] > > > [[3]]$gene.pair > > > [1] "Lgals1:Pxmp2" > > > > > > [[3]]$sig.cor > > > [1] FALSE > > > -- > > > > > > Mark W. Kimpel MD ** Neuroinformatics ** Dept. of > > Psychiatry > > > Indiana University School of Medicine > > > > > > 15032 Hunter Court, Westfield, IN 46074 > > > > > > (317) 490-5129 Work, & Mobile & VoiceMail > > > (317) 204-4202 Home (no voice mail please) > > > > > > mwkimpel<at>gmail<dot>com > > > > > > ______________________________________________ > > > 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.
