| Ferret has a linear least squares lanczos low pass filter called LSL_LOWPASS whose information can be found here: http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/appendix-a-external-functions/LSL-LOWPASS It low-pass filters in time. If your data are not already on some kind of time axis, you could adapt your data to work with this by defining an equi-spaced time axis which is like your z axis with units of say, hours, instead of km. Define a variable similiar to your dependent variable, but on the new time axis. Run LSL_LOWPASS, get the results, and convert back to your z axis. ------------------------------------------------------------------------------------------ Edward D. (Ned) Cokelet, Ph.D. Oceanographer NOAA/PMEL off: (206) 526-6820 7600 Sand Point Way NE fax: (206) 526-6485 Seattle, WA 98115-6349 The contents of this message are mine personally and do not necessarily reflect any position of the Government or the National Oceanic and Atmospheric Administration. |
BEGIN:VCARD VERSION:3.0 N:Cokelet;E. D. (Ned);;; FN:E. D. (Ned) Cokelet ORG:NOAA/PMEL; TITLE:Oceanographer\, PhD EMAIL;type=INTERNET;type=WORK:Edward.D.Cokelet@xxxxxxxx TEL;type=WORK;type=pref:(206) 526-6820 TEL;type=WORK;type=FAX:(206) 526-6485 item1.ADR;type=WORK:;;7600 Sand Point Way N.E.;Seattle;WA;98115-6439; item1.X-ABADR:us NOTE:The contents of this message are mine personally and do not necessarily reflect any position of the Government or the National Oceanic and Atmospheric Administration. CATEGORIES:PMEL Cyclists X-ABUID:B7E1C068-924B-11D8-B26B-000A9595D2D2\:ABPerson END:VCARD