On Fri, Jul 9, 2010 at 10:20 AM, Noah Silverman <n...@smartmediacorp.com> wrote:
> Hi,
>
> I am trying to figure out a "short" way to access two values output from
> the sort function.
>
>>x <- c(3,4,3,6,78,3,1,2)
>>sort(x, index.return=T)
> $x
> [1] 1 2 3 3 3 4 6 78
>
> $ix
> [1] 7 8 1 3 6 2 4 5
>
>
> It would be great to do something like this (doesn't work.):
>
> c(y, indexes) <- sort(x, index.return=T)
>
> But that doesn't work.
>
> I CAN grab the output of sort in a variable and then access it twice to
> get the values, but that seems wasteful.
Care to do a little study to see how wasteful? The difference is
going to be between:
foo = sort(...)
repeat loads of times{
f(foo$x)
g(foo$ix)
}
and
foo = sort(...)
x=foo$x
ix = foo$ix
repeat loads of times{
f(x)
g(ix)
}
I'd guess that for most applications the difference is less than
something very close to zero.
Barry
______________________________________________
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.
