ffilt

ffilt — coefficients of FIR low-pass

Calling sequence

[x]=ffilt(ft,n,fl,fh)  

Parameters

ft

: filter type where ft can take the values

"lp" : for low-pass filter
"hp" : for high-pass filter
"bp" : for band-pass filter
"sb" : for stop-band filter
n : integer (number of filter samples desired)
fl : real (low frequency cut-off)
fh : real (high frequency cut-off)
x : vector of filter coefficients

Description

Get n coefficients of a FIR low-pass, high-pass, band-pass, or stop-band filter. For low and high-pass filters one cut-off frequency must be specified whose value is given in fl. For band-pass and stop-band filters two cut-off frequencies must be specified for which the lower value is in fl and the higher value is in fh

Author

C. B.