Does this do what you want? > x <- list(1,2,3:7,8,9:10) > sapply(x, function(xx) xx[1]) [1] 1 2 3 8 9 >
-- Tony Plate Benjamin Otto wrote: > Hi, > > > > Sorry for the question, I know it should be basic knowledge but I'm > struggling for two hours now. > > > > How do I select only the first entry of each list member and ignore the > rest? > > > > So for > > > > >>$"121_at" > > >>-113691170 > > > > > >>$"1255_g_at" > > >>42231151 > > > > > >>$"1316_at" > > >>35472685 35472588 > > > > > >>$"1320_at" > > >>-88003869 > > > > > I only want to select > > > > -113691170, 42231151, 35472685 and -88003869 .? > > > > Regards > > Benjamin > > -- > Benjamin Otto > Universitaetsklinikum Eppendorf Hamburg > Institut fuer Klinische Chemie > Martinistrasse 52 > 20246 Hamburg > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > [email protected] 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. > ______________________________________________ [email protected] 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.
