Array limit for matlab coder

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Martin Andersson 2023-4-16

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编辑： Martin Andersson 2023-4-16

Hi,

I'm using matlab coder to speed up time. However, I have an array which in normal matlab becomes ArrayLarge: 31x1x441, 109368 double.

But when I use coder and compile a mex file, my Matlab craches. With the Mex file I have generated I can genrate the same array but only up to aboute ArrayLarge: 31x1x246, 61008 double, before it crashes.

But how can I compile an mex file which can create the ArrayLarge: 31x1x441, 109368 double, which is generated with the regular matlab code. Is it some settings in the MatLab coder which I can change? (It is not memory problem for the comuter as the coputer enables to create the ArrayLarge on original MatLab 2022a).

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Answer 1

Walter Roberson 2023-4-16

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I suspect that you are reaching the stack size limit.

If you are generating for real-time work, then you would need to increase the stack size limit.

If you are not generating for real-time work, then enable dynamic memory allocation for the array; https://www.mathworks.com/help/coder/ug/minimize-dynamic-memory-allocation.html

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Walter Roberson 2023-4-16

在 MATLAB Online 中打开

ArrayLarge = zeros(31, 1, 441);
numel(ArrayLarge)
ans = 13671
whos ArrayLarge
  Name             Size                Bytes  Class     Attributes

  ArrayLarge      31x1x441            109368  double              

So the 109368 is already bytes, not number of elements.

Martin Andersson 2023-4-16