Compare error plot in command line for system id toolbox model/data object

Hi All,

I am using system id toolbox and I am trying to reproduce the "Error Plot" using the command line. Here is my code. I would appreciate better way to do this.

error = Validation.y - ypred % Validaton is iddata obj used in system id GUI
ypred = sim(idpoly_model,Validation.u) % model is in idpoly obj.

For ypred, I do not know how to set initial conditions so that the "error" would look similar to what I have in the System Id GUI

Thanks a lot!

Carfield

Answer 1

[Rajiv Singh]

Have you looked at RESID and PE routines? PE calculates prediction errors and allows specification of initial conditions.