Hello all, I am doing some spectral data analysis using R, and I already got some help on how to do savitsky-golay preprocessing. Now I would like to perform parameter selection (i.e. I would like to assess which spectral lines are relevant to keep in the model, and which are not). There exist algorithms like the jacknife algorithm, but I was wondering whether anyone has already implemented something like that, and if not, if anyone could give me a few hints on how to start implementing it myself. Thanks in advance, Dirk -- Dirk De Becker Work: Kasteelpark Arenberg 30 3001 Heverlee phone: ++32(0)16/32.14.44 fax: ++32(0)16/32.85.90 Home: Waversebaan 90 3001 Heverlee phone: ++32(0)16/23.36.65 dirk.debecker at biw.kuleuven.be mobile phone: ++32(0)498/51.19.86 Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm