Using Weighted Classes in CNN

Question

Darrien Walters 2021-3-14

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/772153-using-weighted-classes-in-cnn

评论： Darrien Walters 2021-3-21

采纳的回答： Rishik Ramena

In trying to set up my CNN layers with weighted classes I am getting an error that states:

"Error using classificationLayer>iParseInputArguments (line 58)

'ClassWeights' is not a recognized parameter. For a list of valid name-value pair arguments, see the

documentation for this function."

I am unsure if I'm using the class weights incorrectly. The following are the layers of my network:

classes = ["0","1"];

classWeights = 1./countcats(train_output);

classWeights = classWeights'/mean(classWeights);

layers = [

imageInputLayer([480 1 1])

convolution2dLayer([102 1],3,'Stride',1)

batchNormalizationLayer

leakyReluLayer

maxPooling2dLayer(2,'Stride',2,'Padding',[0 0 0 1])

convolution2dLayer([24 1],10,'Stride',1)

batchNormalizationLayer

leakyReluLayer

maxPooling2dLayer(2,'Stride',2,'Padding',[0 0 0 1])

convolution2dLayer([11 1],10,'Stride',1)

batchNormalizationLayer

leakyReluLayer

maxPooling2dLayer(2,'Stride',2,'Padding',[0 0 0 1])

convolution2dLayer([9 1],10,'Stride',1)

batchNormalizationLayer

leakyReluLayer

maxPooling2dLayer(2,'Stride',2,'Padding',[0 0 0 1])

fullyConnectedLayer(30)

fullyConnectedLayer(10)

fullyConnectedLayer(2)

softmaxLayer

classificationLayer('Classes',classes,'ClassWeights',classWeights)];

This error occurs with and without classes present in the brackets.

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Darrien Walters 2021-3-14

For further clarification i dont believe my layers are the real issue as i have run it before without the weighted classes and got no issue it occurs when i try to add class weights to the classification layer and i am unsure why if i am using the function wrong

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Answer 1

Rishik Ramena 2021-3-21

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/772153-using-weighted-classes-in-cnn#answer_653847

The 'ClassWeights' property for the classificationLayer has been introduced in MATLAB R2021a. So if you are running a version prior to this, you are supposed to get this error. Please find the documentation for your installed MATLAB version here.