[R] Subsetting vectors based on condition
jim holtman
jholtman at gmail.com
Mon Sep 4 14:18:04 CEST 2006
> vect.1
[1] 76 195 290 380
> vect.2
[1] 63 95 133 170 215 253 285 299 325 375
> unlist(lapply(vect.1, function(x)vect.2[which(vect.2 > x)[1]]))
[1] 95 215 299 NA
>
On 9/3/06, Mahesh Krishnan <mskrishnan71 at yahoo.com> wrote:
> Hello,
>
> I have a question regarding subsetting of vectors. Here's an example of
> what I'm trying to do:
>
> vect.1 <- c(76,195, 290, 380)
>
> vect.2 <- c(63, 95, 133, 170, 215, 253, 285, 299, 325, 375)
>
> I would like to subset vect.2 so that it has the same length as vect.1,
> and its numbers are the first corresponging higher value compared to
> vect.1.
>
> The output should be:
>
> final.output = (95, 215, 299, NA)
>
> What is the fastest/most eficient way to accompllish this in R?
>
> Thanks for the help in advance,
>
> Mahesh Krishnan
>
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--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
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