Dear all, I have a time series (years with n column's) and I want to decompose this time series in high, low and bandpass components using a n-years filter (in my case 20 years). Until now I tried many libraries such as mFilter, signal, spectral.methods, but unfortunately without success. Please help me to succeed in this problem. Thank you very much! Best regards! Catalin -- --- Catalin-Constantin ROIBU Lecturer PhD, Forestry engineer Forestry Faculty of Suceava Str. Universitatii no. 13, Suceava, 720229, Romania office phone +4 0230 52 29 78, ext. 531 mobile phone +4 0745 53 18 01 +4 0766 71 76 58 FAX: +4 0230 52 16 64 silvic.usv.ro [[alternative HTML version deleted]]