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plotting RMSE

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dab483
dab483 on 24 Jan 2012
Hi,
i am calculating root mean square error (RMSE) of true state(x) and estimated state (xhat)using the equation below:
err=sqrt(sum(x(:,1)-xhat(:,1))^2/numel(x))
this will gave me one answer at the last of simulation time. Now, if i want to plot the RMSE over simulation time, how should i coding it?

Answers (1)

bym
bym on 25 Jan 2012
Assuming you are calculating x and xhat in a loop with an index variable(e.g. k), then
err(k)=sqrt(sum(x(1:k,1)-xhat(1:k,1))^2/k);
t(k) = dt*k; %simulation time, where dt is time for one increment of loop
%outside of loop:
plot(err,t)

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