When using the armax() function, one can set several options such as 'initialcondition', 'focus', 'searchmethod', etc. If an option is not specified, then the algorithm resorts to the default setting. Regarding the 'searchmethod', the default is set to 'auto' which is explained in the description as:
"A choice among the above is made in the algorithm. The descent direction is calculated using gn, gna, lm and grad successively, in that order, at each iteration until a sufficient reduction in error is achieved."
After running the algorithm on 'auto', I would like to know which of the methods was used to yield the selected model coefficients. Running the algorithm with each option explicitly selected does not yield the same results obtained using 'auto'. There are further options under 'searchoption' pertaining to each 'searchmethod' specifically. However when using 'auto' and then attempting to access the 'searchoption' structure is not possible (invalid propertu name 'SearchOption').
The question is how can I find out what configuration was chosen by the algorithm when running 'auto'? Thank you.
