How to call a .mexw64 file in a .m function? / MEX workflow

Hi there,

I have built a MEX-compatible .c file, compiled it with a suitable compiler, tested it, and generated a .mexw64 file.

I would like to call the MEX function from a .m function, so I tentatively add the path .../project/mex/ ; this is where the .mexw64 file has been placed.

I call the mex file from a .m function which resides at .../project/m/ simply by the filename, as if it were an internal funtion e.g.

chk = calcChecksum(line);

I'm curious about the following:

1) Does this seem like a reasonable approach?

2) Must I do anything to setup the ability to call MEX functions prior to the call?

3) When one does the typical

mex -setup
<choose compiler>
mex '...\project\c\calcChecksum.c'

where is the .mexw64 (or equivalent) file written?

Thanks,

Chris

Answer 1

[Kaustubha Govind]

1. Yes, this is the correct approach.
2. No, you don't need to set anything up, other than adding the directory containing the .mexw64 file to the MATLAB path.
3. Typically the MEX binary gets generated into the directory that you run the MEX command from (unless you use the "-outdir dirname" option with the mex command).

[James Tursa]

Not part of OP's question, but I would add for completeness of the thread:

4. Have a calcChecksum.m file in the same directory as your calcChecksum.mexw64 file that contains all of the help documentation and H1 line for the function. That way "help calcChecksum" and "lookfor" will work.

[Chris L'Esperance]

Thanks very much to you both, for the comments. I like the idea about placing the function description of the .mex in a .m in the same directory. Much appreciated.

[Kaustubha Govind]

Great tip, James. Thanks!

[Hsiu]

Hi! I'm sorry to hijack this thread, but I was wondering what to do if it is the opposite case? Basically if I want a .m file from .mexw64. Thank you!

[James Tursa]

You should probably start a new Question. Also, not sure what you are asking ... turning a mexw64 file into an m-file (not possible), or using a mexw64 file to call an m-file (is possible).