Using dynamic workspace arrays as Matlab function input/output

Question

Niklas Braun 2020-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/669103-using-dynamic-workspace-arrays-as-matlab-function-input-output

回答： Fangjun Jiang 2020-12-1

采纳的回答： Fangjun Jiang

Hey there,

i want to create a Simulink model, where the following happens:

Based on Simulink signal values as input, an array of possible responses shall be created/extended in Matlab base workspace. If the input signals do not change in between simulation steps, the array shall not be extended.
After that, a separate Matlab function Block should choose values from this array, process them and create Simulink output values. The values, which were used to generate the output values shall be removed from the list (or marked as used)

So far, I have created a Matlab function block, which takes the simulink signal, as well as a constant, which points to the list in the Matlab workspace, as input. And outputs the updated list. How can i write the updated list in the workspace?

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Fangjun Jiang 2020-11-30

Why involve MATLAB base workspace? The interface between your part 1 and part 2 could be an ordinary signal, a vector signal or array signal.

Niklas Braun 2020-12-1

Thanks for the hint.

So i could use the array as Input and Output of part 1 and part 2 Matlab function blocks and then loop it pack to part 1 with a memory block in between?

Is it possible to have variable array length in that configuration, or has the initial memory value to specify the later array size?

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Answer 1

Fangjun Jiang 2020-12-1

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https://ww2.mathworks.cn/matlabcentral/answers/669103-using-dynamic-workspace-arrays-as-matlab-function-input-output#answer_561638

Use vector signal between part 1 and part 2. No need to use memory block. Use Unit delay to resolve algebric loop if needed.
Use global variable if don't want to bother the signal interface. See https://www.mathworks.com/help/releases/R2020b/simulink/ug/using-global-data-with-the-matlab-function-block.html
variable-size signal is supported