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Average filter delay (group delay)

`[gd,w] = grpdelay(b,a,n)`

`[gd,w] = grpdelay(sos,n)`

`[gd,w] = grpdelay(d,n)`

`[gd,w] = grpdelay(___,'whole')`

`[gd,f] = grpdelay(___,n,fs)`

`[gd,f] = grpdelay(___,n,'whole',fs)`

`gd = grpdelay(___,win)`

`gd = grpdelay(___,fin,fs)`

`grpdelay(___)`

`grpdelay(___)`

with no output arguments plots the
group delay response of the filter.

`cceps`

| `designfilt`

| `digitalFilter`

| `fft`

| `freqz`

| `fvtool`

| `hilbert`

| `icceps`

| `phasedelay`

| `rceps`