Re: plotting transfer function in octave 5.2: How to fix error: set: "dataaspectratio' must be finite

[shall689]

Thanks Doug and Torsten.

I have been working on several things and I am not even sure how I got a 8th
order polynomial equation.  Currently, I am only getting a 3rd order
polynomial transfer function and I am able to plot its step response.  

Do either of you know of a good Digital Controls book?  I have a Inverter
Control diagram with both an inner current and outer voltage control loop
and I am stuck on whether or not to add zero order (ZOH) hold to both. 
Currently I am only adding the ZOH transfer function right after the inner
current loop PI.  





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