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matlab to c

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ECE09 ITBHU
ECE09 ITBHU 2011-7-28
关闭： MATLAB Answer Bot 2021-8-20
I converted a function using matlab using matlab coder. in .m file i had declared:----
>> a.b = 37000; a.c = 8;
but as output in .c file i got:----
>>a.b=34000.0 a.c =7.0
? why has the values changed?
  1 个评论
Kaustubha Govind
Kaustubha Govind 2011-7-28
Could you include a simple code snippet that we can use to reproduce the issue. It might also help to mention the command you used to generate code, as well as the MATLAB version.

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回答（2 个）

Walter Roberson
Walter Roberson 2011-7-28
Do those variables happen to be loop control variables in a context where they are incremented by 3000 and 1 respectively before they are used?
  2 个评论
ECE09 ITBHU
ECE09 ITBHU 2011-7-29
No , they aren't. i am making a simple function which outputs a structure named " a ".
Arnaud Miege
Arnaud Miege 2011-7-29
As previously asked, can you post a code snippet and the command used to generate the code, so that we can reproduce the issue?
Mike Hosea
Mike Hosea 2011-8-1
I echo the requests for more of the code. However, let me just point out that MATLAB Coder performs some optimizations. If you had code like this
n = 1;
if ~isreal(x)
n = n + 1;
end
You will probably see
n = 2.0;
generated if x is not real. Is it possible that after your assignment there are statements that the compiler can evaluate during compilation because the values/conditions are already known? -- Mike

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