Ops: b[which.min(abs(a-b))]
On 07/01/2008, Henrique Dallazuanna <[EMAIL PROTECTED]> wrote: > Try this: > > b[which.min(a-b)] > > On 07/01/2008, Johannes Graumann <[EMAIL PROTECTED]> wrote: > > Vectors are numerics. I'd like to know for each a[i], which b[j] delivers > > the smallest abs(a[i]-b[j]). > > > > Thanks for your time. > > > > Joh > > > > Bert Gunter wrote: > > > > > Vectors of what? How is "closest" defined? See e.g. ?dist > > > > > > > > > Bert Gunter > > > Genentch Nonclinical Statistics > > > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > > On Behalf Of Johannes Graumann > > > Sent: Monday, January 07, 2008 11:19 AM > > > To: [EMAIL PROTECTED] > > > Subject: [R] Efficient way to substract all entries in two vectors from > > > eachother > > > > > > Hi all, > > > > > > I'm to inexperienced to come up with the matrix solution elusively > > > appearing on the horizon for the following problem and would appreciate if > > > you could give me a nudge ... > > > I have two vectors a, and b and need to find the closest match for each > > > value of a in b. > > > How to do that efficiently? > > > > > > Thanks, Joh > > > > > > ______________________________________________ > > > 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. > > > > > > ______________________________________________ > > > 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. > > > > ______________________________________________ > > 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 > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
