Dear Simon & R-Users.I have applied your solution also for larger buffer window,and it's working well. But I'm getting the problem harder.I have two vectors: x<- c(0,0,0,0,1,0,0,0,0,1,0,0,0) y<- c(0,-10,0,-10,0,0,0,0,-10,0,0,0,0) And I want to know where the value -1 in x have at least 2 values -10 in y.Considering a buffer of three position before x. i.e. in this example only the figure 1 in position x[5] satisfies the criteria,because y has the values -10 in position y[2] and y[4]. I tried in this way, but I don't know how to say"at least 2 on three conditions on y must be true": which(x==1 & ( c(0,y[1:12])==-10 | c(0,0, y[1:11])==-10| c(0,0,0, y[1:10])==-10 )) thank in advance for you help, Francesco > Date: Wed, 17 Oct 2012 10:36:46 +1100 > Subject: Re: [R] vectors comparison > From: sleepingw...@gmail.com > To: nutini.france...@gmail.com > CC: r-help@r-project.org > > 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. [[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.
