Compiled matlab function does not recognize 'hypercube' function from the 'Image Processing Toolbox Hyperspectral Imaging Library'

Hi,

I have a very simple matlab function that calls the hypercube function (Image Processing Toolbox Hyperspectral Imaging Library) to load hyperspectral data. The codeline is like this: hypercube('path/to/hyperfile.img'). When I run the function in the matlab console, everything works perfectly fine. However, after compiling and executing the function I get the following error: Unrecognized function or variable 'hypercube'

I'm using MATLAB R2021 on a linux server. The command to compile the matlab function is:

/usr/local/MATLAB/R2021b/bin/mcc -o hyper_test -W main:hyper_test -T link:exe -d build/ -v hyper_test.m

I had a similar problem month ago: Compiled matlab function does not recognize 'predict' function from the statistics and machine learning toolbox - MATLAB Answers - MATLAB Central (mathworks.com). Thanks to Stevens answer I could resolve the problem. (Limitations - MATLAB & Simulink - MathWorks Deutschland)

I tried something similar to solve the current problem: introducing the hypercube.m when compiling my function

/usr/local/MATLAB/R2021b/bin/mcc -o hyper_test -W main:hyper_test -T link:exe -d build/ -v hyper_test.m a - hypercube.m

but it didn't help. Would be great if someone has an idea how to solve this.

Thanx!

Answer 1

[Vinayak Choyyan]

Hi Iris,

'hypercube' function is a part of Image Processing Toolbox Hyperspectral Imaging Library which is a support package. To include support packages, try using the -Z option of mcc. You may try adding

-Z autodetect

to your compilation code. Please refer to https://in.mathworks.com/help/compiler/mcc.html?s_tid=doc_ta#mw_e47936cc-924b-41b1-94cd-c1b4be325db4 for more details.

Also, I notice in the question above, you have written "-v hyper_test.m a - hypercube.m". I believe you where trying to do "-a" and not "a -".

Hope this resolves the issue you are facing.

[Iris]

Hi Vinayak,

thanks a lot for your answer!

First: yes you are right about the typo... it suppose to be "-a"

I tried to add "-Z autodetect" to the mcc command, but unfortunately it still didn't work.

However, it worked when I added "-a /home/blaa_path_to/MATLAB/SupportPackages/R2021b" to the mcc command.

I get a few warnings during compiling my code like this:

[Warning: In

"/home/blup/Documents/MATLAB/SupportPackages/R2021b/toolbox/images/supportpackages/hyperspectral/+matlabshared/+supportpkg/+internal/+sppkglegacy/HYPERSPECTRAL.m",

"matlabshared.supportpkg.internal.sppkglegacy.SupportPackageRegistryPluginBase"

are excluded from packaging for the MATLAB Runtime environment according to the

MATLAB Compiler license. Either remove the file or function from your code, or

use the MATLAB function "isdeployed" to ensure the function is not invoked in

the deployed component.]

[Warning: In

"/home/blup/Documents/MATLAB/SupportPackages/R2021b/toolbox/images/supportpackages/hyperspectral/hyperui/+hyper/+internal/+app/+viewer/+hyperspectral/+display/+dialog/VariableDialog.m",

"create" could not be found during compilation. Verify that path related flags

(-N, -p, -I) are correctly used.]

But at the end it works...Not sure if I should be concerned about the warnings...

thanks and cheers!

[Vinayak Choyyan]

Great to hear that the issue you were facing is now resolved. I was able to reproduce the issue in R2021b and would like to share that this issue has been fixed in the latest release of MATLAB.

[Iris]

Oh thats really good to know, since we planned an upgreat soon. Thanks for the info!