for example, I have
a1=c(1,3,5)
a2=c(2,4,6)
a3=c(7,8)
a4=c(9,10)
now if I have i=5, so i in a1, then I get a feedback tag[5]=1
i=8, so i in a3, then can get tag[8]=3
in there any function to do this to check the element belongs to which
group?
thank you!!!
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song song wrote:> for example, I have > > a1=c(1,3,5) > a2=c(2,4,6) > a3=c(7,8) > a4=c(9,10) > > now if I have i=5, so i in a1, then I get a feedback tag[5]=1 > i=8, so i in a3, then can get tag[8]=3 > > in there any function to do this to check the element belongs to which > group? > > thank you!!!Not exactly sure what tag[x] is , but I think you want ?%in%
You could try this:
i <- c(5, 8)
a <- list(a1, a2, a3, a4)
subset(stack(as.data.frame(sapply(a, '[', 1:max(sapply(a, length))))),
values %in% i, ind)
On Thu, Jun 17, 2010 at 8:40 PM, song song <rprojecthelp@gmail.com> wrote:
> for example, I have
>
> a1=c(1,3,5)
> a2=c(2,4,6)
> a3=c(7,8)
> a4=c(9,10)
>
> now if I have i=5, so i in a1, then I get a feedback tag[5]=1
> i=8, so i in a3, then can get tag[8]=3
>
> in there any function to do this to check the element belongs to which
> group?
>
> thank you!!!
>
> [[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.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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Hi: Here's another approach: library(reshape) l <- list(a1, a2, a3, a4) ll <- melt(l) ll[ll$value %in% i, 'L1'] # [1] 1 3 HTH, Dennis On Thu, Jun 17, 2010 at 4:40 PM, song song <rprojecthelp@gmail.com> wrote:> for example, I have > > a1=c(1,3,5) > a2=c(2,4,6) > a3=c(7,8) > a4=c(9,10) > > now if I have i=5, so i in a1, then I get a feedback tag[5]=1 > i=8, so i in a3, then can get tag[8]=3 > > in there any function to do this to check the element belongs to which > group? > > thank you!!! > > [[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]]