Help defining a variable before subscripting it for Code Generation

Question

Jess 2013-3-26

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https://ww2.mathworks.cn/matlabcentral/answers/68710-help-defining-a-variable-before-subscripting-it-for-code-generation

回答： Navid Mohammadzadeh 2017-11-24

Hi all,

Trying to rewrite some code so I can convert it into C using Matlab Coder.

Currently running into this error: "Code generation requires variable 'my variable' to be fully defined before subscripting it."

My code looks like this:

      myvariable(1).name = 'John';
      myvariable(1).value = something;
      myvariable(1).number = 1;
      myvariable(2).name = 'Tom';
      myvariable(2).value = other_something;
      myvariable(2).number = 1;

The suggestion given is to define myvariable before by either using zeros, repmat or struct, however doing that produces errors such as "Index exceeds matrix dimensions" or "Structure assignment to non-structure object". Any help would be appreciated!

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Jess 2013-3-26

在 MATLAB Online 中打开

After fiddling around, this seems to have done the trick:

myvariable = repmat(struct('name',[],'value',[],'number',[]),1,1);

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Answer 1

Navid Mohammadzadeh 2017-11-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/68710-help-defining-a-variable-before-subscripting-it-for-code-generation#answer_292946

Hi there!

I have this problem in my MATLAB Function Block. Let me know where do I have to put this line command in my Matlab code, Do I have to define it at very beginning?!

Regard