What is FIR bandstop filter?
"fir" — The function designs a minimum-order, linear-phase, finite impulse response (FIR) filter. To compensate for the delay, the function appends to the input signal N/2 zeros, where N is the filter order. The function then filters the signal and removes the first N/2 samples of the output.
How to plot frequency response of FIR filter in Matlab?
h = freqz(___, f , fs ) returns the frequency response vector h evaluated at the physical frequencies supplied in f . freqz(___) with no output arguments plots the frequency response of the filter.