how to use arguments in freqz function of signal processing toolbox

I found freqz function in signal processing toolbox

This function is describing follow as [h,w]=freqz(b, a,n) [h,f]=freqz(b,a,n,fs) ..

I have a question for this function in arguments

I would like to know the meaning of "1" in freqz(h,1) function

Thanks

Answer 1

[kjetil87]

It just means that the denominator in the filter equation is one, therefor typing freqz(h,1) is kinda misleading because h is often used as

h=b/a

[Byung lok]

Thanks