Problem with matlab function block.

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dimitris
dimitris 2012-2-5
评论： Yanbo 2013-10-17
I use a matlab function block in my simulink model and when i read a variable(for example N) from a file i get an error, but if i write N=2 it works fine. The problem is that i have to read this variable from a file. The error is : "Computed maximum size is not bounded. Static memory allocation requires all sizes to be bounded. The computed size is [:? x 1] Function 'MATLAB Function' : B=zeros(N,1,'double')". Any ideas are welcome. Thank you in advance.

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采纳的回答

Kaustubha Govind
Kaustubha Govind 2012-2-6
The MATLAB Function block does not allow dynamic sizing of variables. The best you can do is figure out a maximum size for your variable, and then declare it as follows:
coder.varsize('B', [128 1]);
B = zeros(N, 1);
  1 个评论
Yanbo
Yanbo 2013-10-17
Hi Kaustubha,
Can coder.varsize be replaced by eml.varsize ? I am not quite sure about the difference between the two, and what toolbox shall I download to enable coder, as currently my matlab doesn't support coder.
Cheers,
Yanbo

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更多回答（1 个）

Walter Roberson
Walter Roberson 2012-2-5
You will need to allocate the memory first with a fixed maximum size, and then if you find that N is smaller than that size you can delete the extra storage from the array.

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