How can calculate ( MSE , NMSE , Correlation Coefficient ) for the output result of neural network ?

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Aya Ahmed 2020-8-16

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编辑： masoud sistaninejad 2021-8-4

I want to calculate ( Mean Square Error , Normalized Mean Square Error , Correlation Coefficient ) for the output result of neural network using matlab code ...

the Data are a group of different images, its features were extracted using PCA and then entered into the Nueral Network.

How can I know about system performance ?

PLZ any help .. thanks

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Aya Ahmed 2020-8-20

yuval,, I want to make image classification in to three types of images

Aya Ahmed 2020-8-20

Greg Heath the output is like that : -

three classes of images ,, i want to get there performance like Mean Square Error , Normalized Mean Square Error , Correlation Coefficient

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masoud sistaninejad 2021-8-4

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编辑：masoud sistaninejad 2021-8-4

inputs = x_test ; % your test data inputs

targets = y_test ; % your test data targets

P = net(inputs);

Error = targets - P;

MSE = mse(targets,P);

NMSE = (mean(error.^2)) / (mean(var(targets',1)));

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