You probably want to use "ifelse" s <- ifelse(news1o>s2o, 1, -1)
'if' only handle a single logical expression. On Mon, Jul 12, 2010 at 10:02 AM, Raghu <r.raghura...@gmail.com> wrote: > I know the following may sound too basic but I thought the mailing list is > for the benefit of all levels of people. I ran a simple if statement on two > numeric vectors (news1o and s2o) which are of equal length. I have done an > str on both of them for your kind perusal below. I am trying to compare the > numbers in both and initiate a new vector s as 1 or 0 depending on if the > elements in the arrays are greater or lesser than each other. When I do a > simple s=(news1o>s2o) I get the values of S as a string of TRUEs and FALSEs > but when I try to override using the if statements this cribs. I get only > one element in s and that is a puzzle. Any ideas on this please? Many > thanks. > > > if(news1o>s2o)(s<-1) else > + (s<--1) > [1] -1 > Warning message: > In if (news1o > s2o) (s <- 1) else (s <- -1) : > the condition has length > 1 and only the first element will be used >> s > [1] -1 >> length(s) > [1] 1 > str(news1o) > num [1:3588] 891 890 890 888 886 ... >> str(s2o) > num [1:3588] 895 892 890 888 885 ... > > > > > -- > 'Raghu' > > [[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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ 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.
