Your question does not seem to make sense - there is no value of -500 in Y (did you mean -10?). Anyway, I think this might work:
which(y==-10 & (x==1 | c(0, x[-length(x)]) == 1 | c(x[-1], 0) == 1)) ... though one would think there is a more elegant way On Wed, Oct 17, 2012 at 10:07 AM, Francesco Nutini <nutini.france...@gmail.com> wrote: > > Dear R-Users, > I'd like to have your help on this problem: > I have two vectors:x<- c(0,1,0,0,0,0,0,0,0,0,0,1,0)y<- > c(0,0,-10,0,0,-10,0,-10,0,0,0,0,0) > And I want to know where the value -500 in y have a correspondence value 1 in > x.Considering a buffer of one position before and after in x.i.e. in this > example only the -10 in position y[3] satisfies the criteria, because x has > in position x[2]the figure 1. > Thank in advance for you help,Francesco > > > > > > > [[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. ______________________________________________ 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.
