Hi Josh, How about
apply(Data, 1, function(row) sd(row) == 0) ? Best, Ista On Mon, Feb 6, 2012 at 1:34 PM, LCOG1 <jr...@lcog.org> wrote: > Hi all > For the data below, I would like to return a logical value indicating > differences in the data. > > #Create data > Data..<-data.frame(a=rep(1,10),b=c(rep(1,9),2),c=c(rep(1,8),2,2)) > > a b c > 1 1 1 1 > 2 1 1 1 > 3 1 1 1 > 4 1 1 1 > 5 1 1 1 > 6 1 1 1 > 7 1 1 1 > 8 1 1 1 > 9 1 1 2 > 10 1 2 2 > > > So what I want is to return logical value telling me if all the values are > the same. So the result would be a b c DidChange > 1 1 1 1 FALSE > 2 1 1 1 FALSE > 3 1 1 1 FALSE > 4 1 1 1 FALSE > 5 1 1 1 FALSE > 6 1 1 1 FALSE > 7 1 1 1 FALSE > 8 1 1 1 FALSE > 9 1 1 2 TRUE > 10 1 2 2 TRUE > > I bet apply could handle this elegantly but that family of functions is > still not 100% intuitive to me. Thoughts. Thanks everyone > > Cheers, > Josh > > > -- > View this message in context: > http://r.789695.n4.nabble.com/I-bet-apply-has-a-solution-tp4362294p4362294.html > Sent from the R help mailing list archive at Nabble.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.
