Matlab Coder and saving variables to a file

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CP 2011-8-24

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https://ww2.mathworks.cn/matlabcentral/answers/14465-matlab-coder-and-saving-variables-to-a-file

How can I dump of variables to a file using Matlab Coder? It complains that fopen can't be used for this (I don't want to do coder.extrinsic).

Also, somewhat related, is there a way to inject C code into an m-file such that when Coder tries to generate code it simply copies that C code over to the C file unprocessed?

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Answer 1

Desiree 2011-8-25

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https://ww2.mathworks.cn/matlabcentral/answers/14465-matlab-coder-and-saving-variables-to-a-file#answer_19682

You can use coder.ceval to call the C routine of FOPEN instead of the MATLAB implementation of FOPEN as this is not supported for code generation with MATLAB Coder.

There is a MATLAB Coder demo for reading from an external file which shows how to use this:

coderdemo_readfile

You can include custom code by adding with coder.config options, see:

http://www.mathworks.com/help/releases/R2011a/toolbox/coder/ug/brbpy6d-1.html#brbpy6d-3

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CP 2011-8-25

Thanks, don't have time to look at the demo in detail just now but it looks like it's exactly what I wanted.

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Answer 2

Walter Roberson 2011-8-24

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https://ww2.mathworks.cn/matlabcentral/answers/14465-matlab-coder-and-saving-variables-to-a-file#answer_19650

Could you use coder.extrinsic('#include "source_to_inject.h"')

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Kaustubha Govind 2011-8-25

Walter: No. The coder.extrinsic directive is used to call MATLAB functions unsupported for code generation. Desiree's suggestion of using coder.ceval is the right approach.