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?

Answer 1

[Desiree]

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

[CP]

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

Answer 2

[Walter Roberson]

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

[Kaustubha Govind]

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.

[Walter Roberson]

Thanks. I haven't read enough messages about coder.* yet to have the pieces straightened out yet.