Simulink matlab function block with two outputs, can't make it work

Question

Charalampos Loukas 2017-6-5

0
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https://ww2.mathworks.cn/matlabcentral/answers/343380-simulink-matlab-function-block-with-two-outputs-can-t-make-it-work

评论： Charalampos Loukas 2017-6-8

I've got the following problem. I run a simulation which extract an array called Iabc to workspace. I use then a function which takes as an input this array and have as outputs the fault location and an error. I would like to use a matlab function block inside simulink that will run the function and will show the fault location and the error in two displays. However, the function to work has to wait simulation to finish in order to get this array to work. I dont know how to do that. Any ideas?

The code of the function is:

 function[location,er]=fault(Iabc)
Iaa=Iabc(:,1);
Ibb=Iabc(:,2);
Icc=Iabc(:,3);
.
.
.
location=((2.89*10^5)*td*10^-6)/2;
actual_fault=get_param('two_remotes/Distributed Parameters Line','Length');
k=str2num(actual_fault);
er=abs(location-k);
end

I want to work like that, to take as input the array.

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Charalampos Loukas 2017-6-5

It gives error when simulating like: Index expression out of bounds. Attempted to access element 2. The valid range is 1-1. More information

Function 'MATLAB Function' (#142.60.61), line 3, column 12: "2" Launch diagnostic report.

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Answer 1

Don Zheng 2017-6-8

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Your input seems to be a column vector and your MATLAB function is asking for the second and the third columns from the input. If the input only have three elements, try just Iaa=Iabc(1); Ibb=Iabc(2); Icc=Iabc(3);