Alternatives for functions not supported for code generation

Hi All,

I am using MATLAB coder to generate C code from MATLAB code files.

Some functions are not supported for code generations

e.g.

fullfile

dir

pwd

cell2mat

strcat

incidence ( https://in.mathworks.com/help/matlab/ref/graph.incidence.html?searchHighlight=incidence%20matrix&s_tid=srchtitle_support_results_2_incidence%20matrix#d126e602316 )

successors

Suggestions on alternate options for the above-mentioned functions would be of great help.

[Deepa Maheshvare]

Any suggestions?

Answer 1

[Walter Roberson]

The following are supported for code generation in R2023b:

• fullfile https://www.mathworks.com/help/matlab/ref/fullfile.html#refsect-extended-capabilities (as of R2023b)
• pwd https://www.mathworks.com/help/matlab/ref/pwd.html#refsect-extended-capabilities (as of R2023a)
• cell2mat https://www.mathworks.com/help/matlab/ref/cell2mat.html#refsect-extended-capabilities (as of R2023b)
• strcat https://www.mathworks.com/help/matlab/ref/strcat.html#refsect-extended-capabilities (as of R2023a)

Still not supported:

• dir
• incidence

dir() is a tricky one, as MATLAB Coder is designed to be able to target systems that do not have file systems.

incidence is something that could be programmed yourself with (for example) accumarray (if a "full" matrix is acceptable) or using sparse if you need a sparse version.

I would suggest to you that it would be easier if you were to upgrade to R2023b. Otherwise you are going to need to call coder.ceval

[Deepa Maheshvare]

Thank you so much. I am installing R2023b.

May I know if ode15s is supported for code generation?

[Walter Roberson]

Yes, ode15s is supported for code generation

https://www.mathworks.com/help/matlab/ref/ode15s.html#refsect-extended-capabilities

Note that

• Variable-sizing support and dynamic memory allocation must be enabled.

[Deepa Maheshvare]

If I may ask one more question,

I'm generating the C++ code using MATLAB coder to use the generated code in OpenCL. I would like to ask for your suggestions for understanding if this is the right way forward : i.e. MATLAB > C++ > OpenCL.

I came across a package such as MatCL ( https://github.com/philipheinisch/MatCL ). But since the interface is not maintained and not well documented, I wasn't sure if I can use that.

[Walter Roberson]

Sorry, I have not worked with OpenCL.