T
hank you very much, Bert.  Point well taken.
Regards,
Jorge.-


On Wed, Jun 19, 2013 at 12:07 AM, Bert Gunter <gunter.berton@gene.com>wrote:

> Jorge: No.
>
> > a <-c(1,5,8,15,32,33.5,69)
> > b <-c(8.5,33)
> > a[findInterval(b, a)]
> [1]  8 32  ##should be  8   33.5
>
> I believe it has to be done explicitly by finding all the differences
> and choosing those n with minimum values, depending on what n you
> want.
>
> Note that the problem is incompletely specified. What if the same
> value of a is closest to several values of b? -- do you want all the
> values you choose to be different or not, in which case they may not
> be minimum?
>
> a <- c(1, 8, 9)
> b <- c(2,3)
>
> Then what are the 2 closest values of a to b?
>
> -- Bert
>
> On Tue, Jun 18, 2013 at 5:43 AM, Jorge I Velez <jorgeivanvelez@gmail.com>
> wrote:
> > Dear Andras,
> >
> > Try
> >
> >> a[findInterval(b, a)]
> > [1]  8 32
> >
> > HTH,
> > Jorge.-
> >
> >
> > On Tue, Jun 18, 2013 at 10:34 PM, Andras Farkas <motyocska@yahoo.com>
> wrote:
> >
> >> Dear All,
> >>
> >> would you please provide your thoughts on the following:
> >> let us say I have:
> >>
> >> a <-c(1,5,8,15,32,69)
> >> b <-c(8.5,33)
> >>
> >> and I would like to extract from "a" the two values that are closest to
> >> the values in "b", where the length of this vectors may change but b
> will
> >> allways be shorter than "a". So at the end based on this example I
> should
> >> have the result "f" as
> >>
> >> f <-c(8,32)
> >>
> >> appreciate the help,
> >>
> >> Andras
> >>
> >> ______________________________________________
> >> 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]]
> >
> > ______________________________________________
> > 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.
>
>
>
> --
>
> Bert Gunter
> Genentech Nonclinical Biostatistics
>
> Internal Contact Info:
> Phone: 467-7374
> Website:
>
> http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
>

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