Compiled matlab function does not recognize 'predict' function from the statistics and machine learning toolbox

Hi,

I have a very simple matlab function that calls the predict function (statistics and machine learning toolbox) to calculate a value (The model I use is a linear regression model if that matters). Whe 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 'predict'

I'm using MATLAB R2021 on a linux server. The command to compile the matlab function is: /usr/local/MATLAB/R2021b/bin/mcc -o predict_test -W main:predict_test -T link:exe -d build/ -v predict_test.m

Is there something wrong the way I compile the function?

Thanx!

Answer 1

[Steven Lord]

How are you creating or obtaining the first input you pass to predict? My suspicion is that you're loading an object from a MAT-file then calling predict with that object as the first input.

If that's the case you need to tell MATLAB Compiler that it needs to include the definition of the class of that object when it creates the application as per the Tip in the second section on this documentation page.

[Iris]

YES!!!!! That solves the problem!!! Thank you so much!!

[bo]

@Iris

Could you point out how you resolve this problem? Thanks.

[Walter Roberson]

@bo

As we said already in https://www.mathworks.com/matlabcentral/answers/1949593-how-to-install-deep-learning-toolbox-in-matlab-runtime#comment_2713273

you probably need to include the comment

%#function SeriesNetwork

The %#function is literal there -- do not replace function by some other word. The SeriesNetwork part is the name of the MATLAB class of the kind of network that you created. The other major possibility is DAGNetwork

[bo]

do you mean I add following comment before load?

%#function DAGNetwork

[Walter Roberson]

Yes, for the case you are using a DAGNetwork. What does class() of the saved network show?

[bo]

The class(network) show 'DAGNetwork'.

MATLAB report error when load the net.

>> load('DAGnet.mat')

Warning: Unable to load instances of class nnet.onnx.layer.ElementwiseAffineLayer into a heterogeneous array. The definition of nnet.onnx.layer.ElementwiseAffineLayer could be missing or contain an error. Default objects will be substituted.

[Walter Roberson]

You could try adding

%#function nnet.onnx.layer.ElementwiseAffineLayer