Thanks for all the response,
I manage to write a small function to complete what I want based on the
wonderful helps.
iround <- function(x, interval){
## Round numbers to desired interval
##
## Args:
## x: Numeric vector to be rounded
## interval: The interval the values should be rounded towards.
## Retunrs:
## a numeric vector with x rounded to the desired interval.
##
interval[ifelse(x < min(interval), 1, findInterval(x, interval))]
}
iround(0:100, c(1, 5, 10, 20, 50))
Cheers, and thanks for all the help again.
On 1/12/2011 5:20 p.m., Duncan Murdoch wrote:
On 01/12/2011 10:55 AM, Michael Kao 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.
I think you could put together such a thing using cut().
Duncan Murdoch
______________________________________________
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.
