dealing with variable size signals
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Hello all,
I am dealing with variable sized outputs of Matlab fuctions in Simulink and blocks which does not support variable sized inputs (unit delay, demux etc.)
I have several matlab functions, which have vector outputs. While compiling, I get errors that I should specify these outputs as variable sized outputs and identify the maximum vector dimesion.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/194754/image.png)
In my model, these type of outputs shall connect to an unit delay or demux, depending the function/output. But, again, while compiling, I get the following error:
" Simulink cannot propagate the variable-size mode from the output port 2 of 'XXX' to the input port 1 of 'XXX/Demux'. This input port expects a fixed-size mode. The variable-size mode originates from 'XXX'. Examine the configurations of 'XXX/Demux'' for one of the following scenarios: 1) the block does not support variable-size signals; 2) the block supports variable-size signals but needs to be configured for them."
How can I manage these errors, what blocks should I use, any suggestions?
Thanks in advance
2 Comments
Walter Roberson
on 12 Nov 2018
I wonder if transfer functions accept variable-sized signals? If they do then that might be a way to get a delay.
But demux does rely upon signals being fixed length. Perhaps you need to be using a bus.
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