MATLAB: How to concatenate vectors and matrices as inputs to a MATLAB fnc block in SIMULINK

arraysmatlab functionsimulink

Hi,

I am having issues concatenating 3 outputs (1×1, 3×1, and 3×3) that are the inputs to a matlab function SIMULINK block. Is there a way I can concatenate or use a different approach to merge those 3 ouputs into one signal so I can use them in my matlab function block?

I have attached a picture showing the basic setup and also the error message.

Thanks!

Best Answer

If you are trying to concatenate a 1x1, 3x1 and 3x3 input, how do you expect the output to look like? It's not possible...

I think you are more looking for a Bus Creator. With a bus you can 'merge' different signals of different sizes and data types. A Bus is essentially a struct from C code.

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Using a flag is perfect, but if ~(exist('flag') == 1) would be a very poor implementation. Remember that this would search in the complete Matlab path for the files 'flag.m', 'flag.mexw64', variables, Java classes, folders etc. also. This is slow and might not reflect what you need.

But adding a flag to the figure's ApplicationData is fine and secure:

flagIsSet = isappdata(FigureHandle, 'MyFlag');
setappdata(FigureHandle, 'MyFlag', true);
if flagIsSet
   % run your code, which should run once only
end

Best Answer

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