Where is inport value coming from?

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K E 2012-3-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/32128-where-is-inport-value-coming-from

I am trying to decipher a Simulink model that someone else wrote. Several blocks have inports labeled 'position'. But I can't figure out if 'position' is calculated during the simulation (though I expect that it is) or is pulled in from the workspace. If 'position' comes from the workspace, it must have another name; there are no variables in the workspace with this name.

Is there a way to trace and identify the value that goes into an inport?

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Answer 1

Kaustubha Govind 2012-3-13

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https://ww2.mathworks.cn/matlabcentral/answers/32128-where-is-inport-value-coming-from#answer_40619

See Importing Data to Root-Level Input Ports. In particular, you need to look at the Configuration Parameters > Data Import/Export > Input parameter.

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K E 2012-3-13

Thanks. This was helpful in diagnosing my problem, which stemmed from not understanding that a Discrete FIR filter created the signal labeled 'position'; 'position' never becomes a named variable. I did learn to trace inputs and outputs (right click on the line and choose 'Highlight To Destination' and 'Highlight to Source'.)

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