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LS method in idetification ,control engeeniring

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saeed
saeed 2024-5-12
评论： saeed 2024-5-12
Hi,how are you?I have problem with that code,is about LS method with ARX model in identification,I should use xcorr command for EPS variable to compare it that how much is near to white noise ?
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saeed
saeed 2024-5-12
编辑：Sam Chak 2024-5-12
Ran in:
clc, clear, close all, N=100; e=100*randn(1,N); x=1:N; a2=0.5; a1=1; a0=2; y=a2*x.^2+a1*x+a0+e; plot(x,y,'Linewidth',2); phi=ones(N,1); Y=y'; theta_hat=phi./Y; Y_hat=phi.*theta_hat; Eps=Y-Y_hat; V0=Eps'*Eps/2; hold on, plot(x,Y_hat,'LineWidth',2); clear phi theta_hat
saeed
saeed 2024-5-12
How can I compare Eps with e by xcorr command to know that error is atleast near to white noise

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