convert matlab neural network to onnx

I made a network with neural network fitting in matlab, I want to convert this to onnx.

However, an error pops up and the conversion is not possible. What's wrong?

nnet.internal.cnn.onnx.exportONNXNetwork>iValidateNetwork

nnet.internal.cnn.onnx.exportONNXNetwork>iValidateInputs

nnet.internal.cnn.onnx.exportONNXNetwork

exportONNXNetwork

Answer 1

[David Willingham]

Hi, is it possible to share the model you're looking to export?

[정민 이]

x = 'input';
t = 'output';

% Choose a Training Function
% For a list of all training functions type: help nntrain
% 'trainlm' is usually fastest.
% 'trainbr' takes longer but may be better for challenging problems.
% 'trainscg' uses less memory. Suitable in low memory situations.
trainFcn = 'trainbr';  % Bayesian Regularization backpropagation.

% Create a Fitting Network
hiddenLayerSize = 8;
net = fitnet(hiddenLayerSize,trainFcn);

% Setup Division of Data for Training, Validation, Testing
net.divideParam.trainRatio = 70/100;
net.divideParam.valRatio = 15/100;
net.divideParam.testRatio = 15/100;

% Train the Network
[net,tr] = train(net,x,t);

% Test the Network
y = net(x);
e = gsubtract(t,y);
performance = perform(net,t,y)

% View the Network
view(net)

[David Willingham]

Hi,

It appears that the function your are training is based on our legacy shallow neural network framework, this currently doesn't support export to ONNX.

The ability to export to ONNX is available with our newer Deep Learning framework, trained with the function trainNetwork.

[정민 이]

Then, is there no way to extract it to an ONNX?

[Pulse]

I wounder if is it possible to create a function which parse network object, reads its weights, beases etc. then construct a sequences of layers. Those layers can be assembeld to SeriesNetwork object which you can save as onnx file. I tried to do this but it didn't work, maybe i made mistake somehow

[David Willingham]

As mentioned, the legacy shallow neural network framework currently doesn't have an option to export to ONNX.

In order to export to ONNX you will need to train the neural network using our newer deep learning framework. I.e . train with the function trainNetwork. From there you can use the exportONNXNetwork function.

[정민 이]

Thanks for the answer above, but I want to take this model out and use it. Is there any other file or way to extract this model?

[정민 이]

Can I use exportNetworkToTensorFlow in shallow neural networks?

[Walter Roberson]

@정민 이

exportNetworkToTensorFlow

net: Deep Learning Toolbox network, specified as a SeriesNetwork object, DAGNetwork object, or dlnetwork object.

None of the shallow networks produce any of those objects, so NO, you cannot use that function.