[R] vectors comparison

[Simon Knapp]

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.francesco at 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
>
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