Inf and NaN entities in C-code when using Matlab Coder

Question

Dani Tormo 2014-8-5

1
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https://ww2.mathworks.cn/matlabcentral/answers/146378-inf-and-nan-entities-in-c-code-when-using-matlab-coder

回答： Mike Hosea 2014-9-15

Hello,

I have a script in Matlab where I use Inf and NaN entities. I used Matlab Coder to generate C-code.

The problem arises in the C-code when using the function rtGetInf() to initialize rtInf (Inf number in Matlab). This function returns zero.

Why is that and how should I solve it?

I haven't looked where I use the NaN but I guess I'll face a similar problem.

I'm using Visual Studio 2010 Professional to compile the generated C-Code into a library to be used in PSCAD.

Thanks a lot! Dani

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Ryan Livingston 2014-8-6

编辑：Ryan Livingston 2014-8-6

Hi Dani,

To clarify, you have generated some C code and you are calling it from C code you are writing in Visual Studio, correct?

If so, are you including calls to the initialize function in the file foo_initialize.h? That function should be called once before invoking the generated code. Similarly foo_terminate should be called when you are done using the generated code. The example:

http://www.mathworks.com/help/coder/ug/using-a-matlab-coder-dynamic-library-in-a-simple-microsoft-visual-studio-project.html

shows calling generated code from Visual Studio. Particularly, step 6 mentions the initialize and terminate functions.

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