is it possible to touch the weights & bias in neural network toolbox

i am right now using neural network toolbox. and would love to do something on weights during training, like apply the saturation function on weights. but cannot find any helpful solution could anybody give any solution for this?

Answer 1

[Greg Heath]

% OMIT THE ENDING SEMICOLONS IN THE FOLLOWING 2 COMMANDS

 net = fitnet
 TRAINPARAM = net.trainParam

% You can directly modify every property listed. For example

 net.trainParam.mu = 0.002;

% Now check to se if mu is changed

Hope this helps.

Thank you for formally accepting my answer

Greg

[Lin Bai]

Thank you Greg, but this looks like how to get access to the weights/biases. My problem is to do something during training.

I used the following code to train, seems i have no access to the weights during training.

 layers = [
    imageInputLayer([28 28 1])

    convolution2dLayer(3,16,'Padding',1)
    batchNormalizationLayer
    reluLayer   

    maxPooling2dLayer(2,'Stride',2)

    convolution2dLayer(3,32,'Padding',1)
    batchNormalizationLayer
    *myLayer(change weight when back propagation)*
    reluLayer...]; 
options = trainingOptions('sgdm',...
    'MaxEpochs',6, ...
    'ValidationData',{valImages,valLabels},...
    'ValidationFrequency',30,...
    'Verbose',false,...
    'Plots','training-progress');
net = trainNetwork(trainImages,trainLabels,layers,options);