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matlab里面stacked的意思,从Matlab中的Stacked Autoencoder获取中间输出

周阳成
2023-12-01

我有一个堆叠的自动编码器网络,我想获得调谐网络的中间输出 . 我的输入数据是1620 x 3000,我的目标数据是12 x 3000.我的测试数据是1620 x 500.我有第一层有400个神经元,第二层有50个神经元,而softmax层到12个 . 我想要调谐后得到第二个自动编码器(50个输出)的输出 .

ann1 = trainAutoencoder(xTrain, 400, ...

'L2WeightRegularization', 0.004, ...

'SparsityRegularization', 4, ...

'SparsityProportion', 0.05, ...

'ScaleData', false)

out1 = encode(ann1, xTrain);

ann2 = trainAutoencoder(out1, 50, ...

'L2WeightRegularization', 0.004, ...

'SparsityRegularization', 4, ...

'SparsityProportion', 0.05, ...

'ScaleData', false)

out2 = encode(ann2, out1);

softNet = trainSoftmaxLayer(out2, yTrain);

deepNet = stack(ann1, ann2, softNet);

tunedDeepNet = train(deepNet, xTrain, yTrain);

outputs = tunedDeepNet(xTest);

% outputs is 12x500

% I would like to get the tuned outputs of the second autoencoder, 50x500

% This gives me 50x500, but it is before tuning.

shortNet = stack(ann1, ann2);

out50 = shortNet(xTest);

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