Pole Zero Map using two vectors

Hey everyone, I have a question concerning the use of the pzmap-function of Matlab which uses a dynamic system model as function input. My problem is how to build such a dynamic system out of a bode plot where I have the following n-dimensional vectors given:

bode_vec = [x1 + j*y1, x2 + j*y2, ..., xn + j*yn ]

freq = [f1, f2, ..., fn]

When I plot the Bode diagram I just use the line

bodeplot = semilogx(ax,freq,20*log10(abs(bode_vec)));

and everything works fine. But how do I get a dynamical system in order to plot a pzmap of the system?

Thanks in advance!

Felix

Answer 1

[Star Strider]

This is a system identification problem. Use the System Identification Toolbox. Start with the iddata (link) function, then tfest (link) since you are starting with a Bode plot.