[Scilab-users] Frequency response

[Samuel Gougeon]

Le 14/09/2018 à 20:57, Claus Futtrup a écrit :
>
> Dear Scilabers
>
> I have calculated an impulse response and wish to do an FFT to achieve 
> the frequency response. I know what to expect. In the matlab forum 
> someone asked the same question and was recommended to use freqz ... I 
> wonder what would be the equivalent function in Scilab?
>
> https://www.mathworks.com/matlabcentral/answers/350350-how-to-plot-loudspeaker-frequency-response-from-its-impulse-response 
>
>
> For example, to replicate the code snippet (second answer in above 
> link), how to do this in Scilab?
>
> h = rand(1,64); // impulse response (Matlab source code)
> fs = 1000;
> Nfft = 128;
> [H,F] = freqz(h,1,Nfft,fs);

Did you have a look around freq() or repfreq()?

We have somewhat the equivalence invfreqz(H,F,m,n,W) <=> frfit(F*2*%pi, 
H, n, W) // Scilab

So you may look for the reciprocal of Scilab's frfit()

HTH
Samuel

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