Instructions for use of R function CGHMultiArrayR.r. 1. Save the files 'CGHMultiArrayR.r' and 'SplitupAnnotated.dll' in the working directory of R and copy your data file ('file.txt') to that directory as well. Data file needs to be in 'plain' format, so remove chromosome and basepair position information! 2. Open R and enter y <- read.table("file.txt") 3. Enter source("CGHMultiArrayR.r") 4. Results are saved in object 'result'. So enter 'result' to see the results.