How do I get the mse after trainin a NN?

Question

gsourop 2016-12-8

0
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https://ww2.mathworks.cn/matlabcentral/answers/316026-how-do-i-get-the-mse-after-trainin-a-nn

回答： Greg Heath 2016-12-13

Hi everyone,

I want to receive the mse from the trained neural network. To make it simple i form a 3 loops, where the out-of-sample time period is t=12, j=2 is the number of predictor and i=2 are the hidden units. Hence, at the end I should receive 2 mse, one for each predictor. I run the following code but the result doesn't look right. Any help please?

>> net = fitnet(hiddenLayerSize);
net.divideParam.trainRatio = 70/100;
net.divideParam.valRatio = 30/100;
net.divideParam.testRatio = 0/100;
net.trainParam.showWindow=false;
% net.trainFcn = 'trainbr';
% net.trainFcn = 'trainscg';
for t=1:12;
for j=1:2;
for i=1:2
[net,tr] = train(net,inputs(j,1:60+t-1),targets(:,2:60+t));
outputs = net(inputs(j,60+t));
errors = gsubtract(targets,outputs);
performance = perform(net,targets,outputs);
MSEtrn(j) = tr.perf(end)
MSEval = tr.vperf(end)
MSEtst = tr.tperf(end)
end;
end
end