Asked by Tamer Yanni
on 20 Nov 2012

I have a non-linear dynamic system that I am trying several approaches to linearize. I am getting different state space systems and I want to compare the non-linear model outputs to those from the models I am fitting, what function in MATLAB can I use to judge different linearized systems and decide which one is the "closest" to the actual model?

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## 1 Comment

## John Petersen (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/54198#comment_112261

You could use identical inputs to each system and compare the outputs with the non-linear model outputs. Depending on the type of signals these are it might make sense you use a mean squared error, absolute error, or simply the difference.