MATLAB: Can I use a NARX neural net to learn a time series of the form: y(k) = K0 * y(k-1) + K1 * x(k) + K2 * x(k-1) + K3 * x(k-2) where x(k) is the input time series

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Can I use a NARX neural net to learn a time series of the form: y(k) = K0 * y(k-1) + K1 * x(k) + K2 * x(k-1) + K3 * x(k-2) where x(k) is the input time series ?

Best Answer

Only if k and n are positive and linearly related.

Hope this helps.

Thank you for formally accepting my answer

Greg

Related Solutions

MATLAB: How to plot the magnitude of x(k) in matlab

You already have a function, you just need to calculate the magnitude, which is just the abs function. The thing is, you can see beforehand that this is a useless exercise, because it will always be 4. The exponent part doesn't influence the magnitude, so k has no influence on the magnitude.

N=20;
x_mag=@(k) abs(4j*exp(-6*pi*1j*k/N));
fplot(x_mag,[0,N-1])

(you can also use linspace and plot)

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Hope this helps