[R] grouping by consecutive integers
Niels Vestergaard Jensen
nvj at fys.ku.dk
Mon Jul 24 17:50:44 CEST 2006
Look at "index vectors" in the R intro.
On Mon, 24 Jul 2006, Kevin J Emerson wrote:
> Hello R-helpers!
> I have a question concerning extracting sequence information from a
> vector. I have a vector (representing the bins of a time series where
> the frequency of occurrences is greater than some threshold) where I
> would like to extract the min, median and max of each group of
> consecutive numbers.
> For Example:
> tmp <- c(24,25,29,35,36,37,38,39,40,41,42,43,44,45,46,47,68,69,70,71)
> I would like to have the max,min,median of the following groups:
> I would like to be able to perform this for many time series so an
> automated process would be nice. I am hoping to use this as a peak
> detection protocol.
> Any advice would be greatly appreciated,
> Kevin J Emerson
> Center for Ecology and Evolutionary Biology
> 1210 University of Oregon
> Eugene, OR 97403
> kemerson at uoregon.edu
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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