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why my predicted output is negative in ANN.

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Sunita
Sunita 2023-11-27
关闭： Cris LaPierre 2023-11-28
why my predicted output is negative in ANN. there is no negative value in the data.
x = input';
t = output';
trainFcn = 'trainlm';
hiddenLayerSize = 40;
net = fitnet(hiddenLayerSize,trainFcn);
net.divideParam.trainRatio = 80/100;
net.divideParam.valRatio = 10/100;
net.divideParam.testRatio = 10/100;
[net,tr] = train(net,x,t);
y = net(x);
e = gsubtract(t,y);
performance = perform(net,t,y)

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