Re: [R] Find the closest value in a list or matrix

From: Tobias Verbeke <tobias.verbeke_at_telenet.be>
Date: Wed, 09 Jul 2008 20:53:15 +0200

Daniel Malter wrote:

> x=c(1:100)
> your.number=5.43
> which(abs(x-your.number)==min(abs(x-your.number)))

or [depending on the problem]:

which.min(abs(x-your.number))

HTH,
Tobias

>
> -------------------------
> cuncta stricte discussurus
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>
> -----Ursprüngliche Nachricht-----
> Von: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org] Im
> Auftrag von R_Learner
> Gesendet: Wednesday, July 09, 2008 11:28 AM
> An: r-help_at_r-project.org
> Betreff: [R] Find the closest value in a list or matrix
>
>
> I have a long list of numbers [3.4,5.4,3.67,....], and I basically want to
> find the index of the number closest to this number that I have, let's say
> 5.43. How would I do this without writing a for loop (I have to do this many
> times for several lists)? Is there a "lookup" function in R?
>
> Thanks!
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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. Received on Wed 09 Jul 2008 - 19:47:26 GMT

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