How to use MEX files in Matlab?

I have some matlab codes (.m file) and its corresponding MATLAB MEX (.mexw32) file in a folder. I am new to the matlab of using mex files. I am not able to run the m files now.

Any help is appreciated.

Thanks

[James Tursa]

Please show exactly what files you have, and exactly what commands you ran, and post the exact error messages you are getting. Are you running Windows 32-bit MATLAB?

[Jab]

I have the attached files in a folder. I am getting the following error Attempt to execute SCRIPT curvelet3d_transform as a function: C:\Users\Emimal Jabason\Documents\MATLAB\curveleg t3d_transform.m

And, I am running WIndows 64-bit Matlab.

Thanks fr your help James!

[veerendhra kumar challa]

i have the attached file in folder.i am getting the following error attempt to execute Error using mex C:\Users\VIGNAN\Downloads\__MACOSX\classify\private\meanShift1.c not found; check that you are in the correct current folder, and check the spelling of 'C:\Users\VIGNAN\Downloads\__MACOSX\classify\private\meanShift1.c'.

Error in toolboxCompile (line 21) mex([dir 'meanShift1.c'], '-outdir', dir );

i am running Windows 64-bit Matlab.

[Walter Roberson]

Why are you trying to compile a MACOSX version on MS Windows ?

I am not sure which files you are referring to as "attached file" ?

Answer 1

[ram vanguri]

You need to compile the c file into a mex library (in matlab).

Setup your Matlab's mex compiler:

>> mex -setup then run the .m file

[Walter Roberson]

After you mex -setup you probably need to

mex FileName

where FileName is the name of the file without extension. For example if you had ghoatbleet.c and ghoatbleet.m then you would invoke

mex ghoatbleet

and if all goes well you would then be able to call ghoatbleet as if it was function written in .m

result = ghoatbleet(....)

[Jab]

I am getting the following error after trying the above steps.

But My files are in the folder.

E:\2nd WORK\curvelet3d_transform not found; check that you are in the correct current
folder, and check the spelling of 'E:\2nd WORK\curvelet3d_transform'.

[Walter Roberson]

You need the C or C++ source, curvelet3d_transform.c or curvelet3d_transform.cpp or curvelet3d_transform.C .

With what you have, you are restricted to using the software with a 32 bit MATLAB on MS Windows.

The routine appears to potentially be part of "Sparsebox", as a routine of that name is mentioned in the thesis http://irfu.cea.fr/Phocea/file.php?class=std&&file=Doc/Publications/Archives/irfu-10-14-T.pdf . However, I do not seem to find any code by that name. You might be able to track down the author and ask about it.

[Jab]

Thank you very much! If I use CurveLab-2.1.3 software, Could you please help me how to add this in Matlab 2015? How to get started this s/w in Matlab? It contains all cpp and mex files but everything different folders.

[Walter Roberson]

http://www.curvelet.org/papers/curvelab.pdf

[Walter Roberson]

See also http://uk.mathworks.com/matlabcentral/answers/163921-error-lnk2019-when-trying-to-use-c-program-of-curvelab-2-1-3

[James Tursa]

Correcting an old post.

Walter's comment above is incorrect. When mexing a source file, you need to use the file name including the extension. So if you had ghoatbleet.c then you would issue the following at the command line:

mex ghoatbleet.c

If you issue the command without the .c extension, MATLAB will search for the file name without the extension, not find it, and report a file not found error.