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How does matlab solve the samples in neural networks?

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Huang Huang
Huang Huang 2019-12-17
回答： Huang Huang 2019-12-19
Usualy the column represents the sample number.But when I test the following codes, the results(weight1 and weight2) are different.Who would help me? Thank you very much!
%------------
clear
clc
X=[0 0 1;0 1 1;1 0 1;1 1 1];
D=[0; 0; 1; 1];
X=X';
D=D';
net=network;
net.numInputs=1;
net.numLayers=1;
net.OutputConnect=1;
net.inputConnect(1,1)=1;
net.trainFcn='traingd';
net.trainParam.epochs=1;
net1=train(net,X,D);
weight1=net1.IW{1,1}
net2=net;
for k=1:4
net2=train(net2,X(:,k),D(k));
end
weight2=net2.IW{1,1}

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采纳的回答

Huang Huang
Huang Huang 2019-12-19
Now,I know why!
In matlab,'traingd' indicates the batch GD method. From above codes,net1 is the batch algorithm,while net2 is the equivalent GD algorithm.
So the difference is right.

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