xPC, getsignalid returns 0, NOT empty

Question

Kosuke 2012-1-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/26856-xpc-getsignalid-returns-0-not-empty

I tried to get signal id by using getsignalid(tg,'signal_name').

For one of the signal in my model, it returns 0 (not empty). I think if the 'signal_name' is wrong, it returns empty. Then, what 0 means? If there is any document about this, I would be happy to know.

Thanks!

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Walter Roberson 2012-1-28

I am not presently able to find any information proving that a signal ID _cannot_ be 0. But there is a lot of documentation to go through and it might have been somewhere I did not look yet.

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Answer 1

Shiva Arun Kumar 2012-2-6

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在 MATLAB Online 中打开

Hi Kosuke,

0 is a valid signal ID and you are correct, [] is returned when the signal name is incorrect.

For example, when you build and download one of our example models "xpcosc", you can execute the following commands to obtain a complete list of signals along with their associated ids:

*tg=xpc
tg.showsignals='on'*
Signals              = INDEX   VALUE             BLOCK NAME                    LABEL                         
                          0       0.000000          Gain                                                        
                          1       0.000000          Gain1                                                       
                          2       0.000000          Gain2                                                       
                          3       0.000000          Integrator                                                  
                          4       0.000000          Integrator1                                                 
                          5       0.000000          Signal Generator                                            
                          6       0.000000          Sum