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whats is that error in matlab?

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Aya Ahmed
Aya Ahmed 2020-6-5
关闭： MATLAB Answer Bot 2021-8-20
When I write this code, the matrix that is called (confusion matrix) does not appear to me .... But this shape appears and says these words and I do not understand the problem:
% load('P2.mat')
% load('P.mat')
% load('T.mat')
net=feedforwardnet(2);
net=train(net,P,T);
view(net)
P3=net(P2);
plotconfusion(T,P3)
  2 个评论
Star Strider
Star Strider 2020-6-5
You may have too many classes for plotconfusion to produce the optimal result.
The warning is just that — a warning. The best option is to restart MATLAB. (This can occur after graphics hardware driver updates.)
Aya Ahmed
Aya Ahmed 2020-6-6
Thank you very mach Star Strider , iam restart the matlab but stel the same error .
plz tel me , how can i know the number of classes ?
i want to make classification with images into three type of images so what I did was.... I made two matrices to train the images: [ One is the input matrix, called P, consisting of 236 rows * 120 columns features of images .The other is the Target matrix, called T, consisting of 120 rows * 120 columns].And a matrix for the test called P2 consists of 236 rows * 120 columns.
Is there anything wrong with that ?? Where are these Classes here?

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