Storing eigenvalues from a loop

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j21 2020-3-30

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https://ww2.mathworks.cn/matlabcentral/answers/513952-storing-eigenvalues-from-a-loop

回答： j21 2020-3-30

Hi everyone,

I have made a code that finds a space-state system matrix A and finds its eigenvalues for one specified parameter (call it U) that is predefined and its a part of matrix A.

Now I want to create a loop that will allow me to vary U (lets say from U=220 to U=250) and then calculate eigenvalues for each U. I am having a trouble writing the code that will store these eigenvalues after each iteration.

Any help is appreciated, Thank you :)

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Answer 1

Hiro Yoshino 2020-3-30

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https://ww2.mathworks.cn/matlabcentral/answers/513952-storing-eigenvalues-from-a-loop#answer_422873

Can I have your code?

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Answer 2

j21 2020-3-30

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https://ww2.mathworks.cn/matlabcentral/answers/513952-storing-eigenvalues-from-a-loop#answer_422876

Hi,

I have in the meantime managed to write the loop that will store the eigenvalues. Now what I have to do is extract the real and imaginary part of each of those (so to get damping and frequency) and plot frequency vs U graph and damping vs U graphs.

Code link:

blob:https://octave-online.net/a4b14750-c038-4650-b289-ab131b3a5b2b