[R] round to specific intervals

[Bert Gunter]

?findInterval
.. would get you the endpoints and then you could determine which is nearer.

Of course in your "example", everything would get "rounded" to 1.

-- Bert

On Thu, Dec 1, 2011 at 7:55 AM, Michael Kao <mkao006rmail at gmail.com> wrote:
> Dear R users/helpers,
>
> I am wondering is there an existing function in which you can round numbers
> to a set of values. I know you can use 5 * round(x/5) for rounding to the
> nearest 5 or so, but what if the interval size is not constant.
>
> For example:
> ## Not run
> test <- rnorm(100)
> round(test, c(1, 5, 10, 20, 50))
>
> so that the test is rounded to the closest value in the vector.
>
> Thanks for the help.
>
> Cheers,
>
> ______________________________________________
> R-help at 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