Hello, are there any plans for a general framework for filters in gsl? I am currently implementing: Savitzky-Golay filters to evaulate derivatives of noisy data, but probably much of the filter-code could be generalized. Regards Joakim -- Joakim Hove hove AT ift uib no +47 (55 5)8 27 90 http://www.ift.uib.no/~hove/