MATLAB: System Identification toolbox: how to print estimated ARMA-coefficients for each iteration step in armax-algorithm

Question

One can calculate ARMA-coefficients using the armax-algorithm from the Systems Identification Toolbox.

The final set of coefficients can be determined using the following code:

estimatedPolymodel=armax(iddata(outputdata,inputdata,tsample),[na nb nc nk], opt);
ARcoeff=estimatedPolymodel.A
MAcoeff=estimatedPolymodel.B

But how can we print the (preliminary) estimated sets of coefficients at each iteration step of the algorithm?

Answer 1

Use "full" display option, as in:

opt=armaxOptions('Display','full');
estimatedPolymodel=armax(iddata(outputdata,inputdata,tsample),[na nb nc nk], opt);