How to access data inside an iddata object?

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Sahar 2015-1-16

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https://ww2.mathworks.cn/matlabcentral/answers/170220-how-to-access-data-inside-an-iddata-object

评论： Jan 2018-3-11

Hi all, I am trying to do the system identification on a system with a lot of data. when data is gathered, I creat an iddata object from all inputs and outputs. then I use identification toolbox for system identification. but for designing the controller and checking for controlability or observability I need to have access to system matrices A,B and C. Does anyone has any idea how to change an iddata object to its state space matrices? Thanks!