ffilt

Arguments

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