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From: Minimax on 30 Jan 2010 07:00 Hello! I have 3d series of z500[lat,lon,t], where lat=1:63 (latitude) lon=1:144 (longitude) t=1:1464 (time with 6 hours timestep) 1 day==4 timesteps And I want to do a bandpass filter from 1 to 5 days. I use the code: [b,a] = butter(1,[ 1/(5*4) 1/(1*4) ],'stop'); y=filter(b,a,z500); Is this correct code? |