How can I get MSE and normalized MSE both as performance function when fitting Feed forward neural network?

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Im fitting a feedforward neural network with 8 input parameters and 1 output parameter.i want to use MSE and normalized MSE both to measure the performance.

Accepted Answer

Greg Heath
Greg Heath on 26 Oct 2018
Divide MSE by the mean variance of the target rows (MSE of the constant output model)
MSEref = mean(var(target',1))
NMSE = mse(target-output)/MSEref
Rsquare = 1 - NMSE
Hope this helps.
Thank you for formally accepting my answer
Greg

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