transfer function doesn't work

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abdulaziz almutairi
abdulaziz almutairi on 8 Feb 2016
Commented: lounis chehrit on 10 Jun 2021
hello everyone, I want to solve and plot the step response of this model, the strength of the impulse is 5 and the step input is 5 too. the file doesn't work!
as you see below
matlab knows the transform function, so what was the error ?

Answers (2)

Adam on 8 Feb 2016
We can't see the full error message.
which tf -all
to see if Matlab really knows about the function. I suspect from the tail end of your error message that you don't have the signal processing toolbox in which it lives.

Muhammed Fasil
Muhammed Fasil on 8 Feb 2016
Its working. I used same code without any change. Try in some other matlab version. Find the attachment
  1 Comment
lounis chehrit
lounis chehrit on 10 Jun 2021
Just a question is It normal to have a transfer function like this ?
It's definied by :
Real(TF(v)) = cos(2*pi*v).
and phase is 0.
I thing that the parameter s=j*w.
So is It normal to have a real part like this? ( parameter in the cosine)
and how to get transfert function from real and image parts.

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