Compute the integral of a signal from Simulink into Matlab

Question

Ubaldo Tiberi 2012-9-9

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https://ww2.mathworks.cn/matlabcentral/answers/47699-compute-the-integral-of-a-signal-from-simulink-into-matlab

Hi all,

I performed a simulation with Simulink, and I saved the data in the Matlab workspace automatically via a Scope block. Now, I want to compute the integral of this signal in Matlab. To be more clear: imagine that I have a struct Results in the Matlab workspace, such that Results is a saved data from a Simulink Scope block. I want to compute the integral of Results.signals.values over Results.signals.time. How should I do?

Thanks,

Ubaldo

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Azzi Abdelmalek 2012-9-9

what do you mean by : I want to compute the integral of Results.signals.values over Results.signals.time

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Answer 1

Kaustubha Govind 2012-9-10

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https://ww2.mathworks.cn/matlabcentral/answers/47699-compute-the-integral-of-a-signal-from-simulink-into-matlab#answer_58358

Perhaps you need trapz or cumtrapz.

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Ubaldo Tiberi 2012-9-10

Thank you! :)

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Answer 2

Ubaldo Tiberi 2012-9-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/47699-compute-the-integral-of-a-signal-from-simulink-into-matlab#answer_58351

Imagine that I issue the command

plot(Results.time,Results.signals.values)

what I get is a figure which represents the signal stored into Result.signals.values over the time span stored into Results.time. If I want to compute the integral of such signal over the time span Results.time what should I do?

I hope this description is more clear. :-)

Ubaldo

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