Where can I find a reference for the algorithm used in freqsep?

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Vinh
Vinh 2024-1-30
编辑： John D'Errico 2024-1-30
I was wondering what algorithm does the freqsep function in MATLAB use, particularly in how it operates on a general state space system? Sorry if this is an off topic question.
  2 个评论
Dyuman Joshi
Dyuman Joshi 2024-1-30
The documentation page of freqsep does not list any such thing.
You could try asking TMW, but I doubt they will disclose much or any of that information.
Other experienced users might have more knowledge/information about this though.
John D'Errico
John D'Errico 2024-1-30
编辑：John D'Errico 2024-1-30
If the code is in an m-file, then it tells you everything you need to know. As long as you can follow the code. If the code is compiled, then the only information will be provided in any references. So look in the doc file, here freqsep. I did not find a reference in the doc.
However, it looks like freqsep does some minor stuff, then just calls a deeper code, called freqsep_, which I did not see the code for. But I did not look more deeply to see if it was private.
If you truly, desperately need to know the algorithm basics, you can contact tech support. I have always found them to be quite friendly and helpful when at all possible. They may or may not be able to help you more, but you can only ask.

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回答（1 个）

Hassaan
Hassaan 2024-1-30
编辑：Hassaan 2024-1-30
The best place to start is the MATLAB documentation itself. MATLAB's documentation often includes references to the algorithms used in their functions, or at least gives a high-level overview of the method employed.
Reference:
Slow-fast decomposition - MATLAB freqsep (mathworks.com)
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Vinh
Vinh 2024-1-30
Thank you for the advice. Unfortunately, this function doesn't have any documentation for references like I have seen for other MATLAB functions. It does mention something about a similarity transform, but I am still confused as to what algorithm they are using (if it is one that is publically known).

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