How to have variable-sized output for Simulink MATLAB-function block?

2013 7 22
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I have a MATLAB function-block in Simulink and I would like to have the output port of the block dynamically sized based on an input parameter. Eg:
function[y] = MATLABblock(u, s)
y = someCalc(u,s) %%Returns array of size s %%
Is this possible?

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Kaustubha Govind
Kaustubha Govind 2013-7-22

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I think this should work as long as you can enforce a maximum size for y. Simulink currently does not support dynamic memory allocation, so you must specify a maximum-size for variable-size signals. Please see the section on Variable-Size Data in the documentation to ensure that your output is configured as variable-size.

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Arun
Arun 2013-7-23
Hi! Thank you for your response. I have got it to work. However, is there a restriction on how many such ports in a block can be variable-sized? The reason is, I have 8 identical ports with identical Port Settings (variable size with an upper bound of 1024), but only one of them works.
Arun
Arun 2013-7-23
Sorry about the above comment. It was a bug in my code. I have corrected that and now it's all good. Thank you very much for your help!

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